Concatenated all JS into a single file (#624)

no issue

- moved large inline JS from templates into separate JS files
  - floating header
  - gallery card support
- use `gulp-concat` to concatenate all JS files into a single `built/casper.js` file
- reduces external JS file requests from 3 (jquery, infinite-scroll.js, jquery.fitvids.js) down to 2 (jquery, casper.js) and reduces page size by removing repeated inline code

assets/built/casper.js

@@ -0,0 +1,2 @@
+!function(n){"use strict";n.fn.fitVids=function(e){var i={customSelector:null,ignore:null};if(!document.getElementById("fit-vids-style")){var t=document.head||document.getElementsByTagName("head")[0],r=document.createElement("div");r.innerHTML='<p>x</p><style id="fit-vids-style">.fluid-width-video-container{flex-grow: 1;width:100%;}.fluid-width-video-wrapper{width:100%;position:relative;padding:0;}.fluid-width-video-wrapper iframe,.fluid-width-video-wrapper object,.fluid-width-video-wrapper embed {position:absolute;top:0;left:0;width:100%;height:100%;}</style>',t.appendChild(r.childNodes[1])}return e&&n.extend(i,e),this.each(function(){var e=['iframe[src*="player.vimeo.com"]','iframe[src*="youtube.com"]','iframe[src*="youtube-nocookie.com"]','iframe[src*="kickstarter.com"][src*="video.html"]',"object","embed"];i.customSelector&&e.push(i.customSelector);var r=".fitvidsignore";i.ignore&&(r=r+", "+i.ignore);var t=n(this).find(e.join(","));(t=(t=t.not("object object")).not(r)).each(function(){var e=n(this);if(!(0<e.parents(r).length||"embed"===this.tagName.toLowerCase()&&e.parent("object").length||e.parent(".fluid-width-video-wrapper").length)){e.css("height")||e.css("width")||!isNaN(e.attr("height"))&&!isNaN(e.attr("width"))||(e.attr("height",9),e.attr("width",16));var t=("object"===this.tagName.toLowerCase()||e.attr("height")&&!isNaN(parseInt(e.attr("height"),10))?parseInt(e.attr("height"),10):e.height())/(isNaN(parseInt(e.attr("width"),10))?e.width():parseInt(e.attr("width"),10));if(!e.attr("name")){var i="fitvid"+n.fn.fitVids._count;e.attr("name",i),n.fn.fitVids._count++}e.wrap('<div class="fluid-width-video-container"><div class="fluid-width-video-wrapper"></div></div>').parent(".fluid-width-video-wrapper").css("padding-top",100*t+"%"),e.removeAttr("height").removeAttr("width")}})})},n.fn.fitVids._count=0}(window.jQuery||window.Zepto),function(c,i){c.Casper||(c.Casper={}),c.Casper.floatingHeader=function(){var r=i.querySelector("#reading-progress"),n=i.querySelector(".floating-header"),o=i.querySelector(".post-full-title"),a=c.scrollY,s=c.innerHeight,d=i.body.clientHeight,l=!1;function e(){l||requestAnimationFrame(t),l=!0}function t(){var e=o.getBoundingClientRect().top+c.scrollY,t=o.offsetHeight+35,i=d-s;e+t<=a?n.classList.add("floating-active"):n.classList.remove("floating-active"),r.setAttribute("max",i),r.setAttribute("value",a),l=!1}c.addEventListener("scroll",function(){a=c.scrollY,e()},{passive:!0}),c.addEventListener("resize",function(){s=c.innerHeight,d=i.body.clientHeight,e()},!1),t()}}(window,document),function(e,t){t.addEventListener("DOMContentLoaded",function(){t.querySelectorAll(".kg-gallery-image img").forEach(function(e){var t=e.closest(".kg-gallery-image"),i=e.attributes.width.value/e.attributes.height.value;t.style.flex=i+" 1 0%"})})}(window,document),function(t,i){var r=i.querySelector("link[rel=next]");if(r){var n=i.querySelector(".post-feed");if(n){var o=300,a=!1,s=!1,d=t.scrollY,l=t.innerHeight,c=i.documentElement.scrollHeight;t.addEventListener("scroll",f,{passive:!0}),t.addEventListener("resize",v),h()}}function u(){if(404===this.status)return t.removeEventListener("scroll",f),void t.removeEventListener("resize",v);this.response.querySelectorAll(".post-card").forEach(function(e){n.appendChild(e)});var e=this.response.querySelector("link[rel=next]");e?r.href=e.href:(t.removeEventListener("scroll",f),t.removeEventListener("resize",v)),c=i.documentElement.scrollHeight,s=a=!1}function e(){if(!s)if(d+l<=c-o)a=!1;else{s=!0;var e=new t.XMLHttpRequest;e.responseType="document",e.addEventListener("load",u),e.open("GET",r.href),e.send(null)}}function h(){a||t.requestAnimationFrame(e),a=!0}function f(){d=t.scrollY,h()}function v(){l=t.innerHeight,c=i.documentElement.scrollHeight,h()}}(window,document);
+//# sourceMappingURL=casper.js.map

assets/built/infinitescroll.js

@@ -1,2 +0,0 @@
-!function(n,t){var r=t.querySelector("link[rel=next]");if(r){var i=t.querySelector(".post-feed");if(i){var o=300,s=!1,l=!1,c=n.scrollY,u=n.innerHeight,d=t.documentElement.scrollHeight;n.addEventListener("scroll",a,{passive:!0}),n.addEventListener("resize",m),f()}}function v(){if(404===this.status)return n.removeEventListener("scroll",a),void n.removeEventListener("resize",m);this.response.querySelectorAll(".post-card").forEach(function(e){i.appendChild(e)});var e=this.response.querySelector("link[rel=next]");e?r.href=e.href:(n.removeEventListener("scroll",a),n.removeEventListener("resize",m)),d=t.documentElement.scrollHeight,l=s=!1}function e(){if(!l)if(c+u<=d-o)s=!1;else{l=!0;var e=new n.XMLHttpRequest;e.responseType="document",e.addEventListener("load",v),e.open("GET",r.href),e.send(null)}}function f(){s||n.requestAnimationFrame(e),s=!0}function a(){c=n.scrollY,f()}function m(){u=n.innerHeight,d=t.documentElement.scrollHeight,f()}}(window,document);
-//# sourceMappingURL=infinitescroll.js.map

assets/built/infinitescroll.js.map

@@ -1 +0,0 @@
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assets/built/jquery.fitvids.js

@@ -1,2 +0,0 @@
-!function(d){"use strict";d.fn.fitVids=function(t){var i={customSelector:null,ignore:null};if(!document.getElementById("fit-vids-style")){var e=document.head||document.getElementsByTagName("head")[0],r=document.createElement("div");r.innerHTML='<p>x</p><style id="fit-vids-style">.fluid-width-video-container{flex-grow: 1;width:100%;}.fluid-width-video-wrapper{width:100%;position:relative;padding:0;}.fluid-width-video-wrapper iframe,.fluid-width-video-wrapper object,.fluid-width-video-wrapper embed {position:absolute;top:0;left:0;width:100%;height:100%;}</style>',e.appendChild(r.childNodes[1])}return t&&d.extend(i,t),this.each(function(){var t=['iframe[src*="player.vimeo.com"]','iframe[src*="youtube.com"]','iframe[src*="youtube-nocookie.com"]','iframe[src*="kickstarter.com"][src*="video.html"]',"object","embed"];i.customSelector&&t.push(i.customSelector);var r=".fitvidsignore";i.ignore&&(r=r+", "+i.ignore);var e=d(this).find(t.join(","));(e=(e=e.not("object object")).not(r)).each(function(){var t=d(this);if(!(0<t.parents(r).length||"embed"===this.tagName.toLowerCase()&&t.parent("object").length||t.parent(".fluid-width-video-wrapper").length)){t.css("height")||t.css("width")||!isNaN(t.attr("height"))&&!isNaN(t.attr("width"))||(t.attr("height",9),t.attr("width",16));var e=("object"===this.tagName.toLowerCase()||t.attr("height")&&!isNaN(parseInt(t.attr("height"),10))?parseInt(t.attr("height"),10):t.height())/(isNaN(parseInt(t.attr("width"),10))?t.width():parseInt(t.attr("width"),10));if(!t.attr("name")){var i="fitvid"+d.fn.fitVids._count;t.attr("name",i),d.fn.fitVids._count++}t.wrap('<div class="fluid-width-video-container"><div class="fluid-width-video-wrapper"></div></div>').parent(".fluid-width-video-wrapper").css("padding-top",100*e+"%"),t.removeAttr("height").removeAttr("width")}})})},d.fn.fitVids._count=0}(window.jQuery||window.Zepto);
-//# sourceMappingURL=jquery.fitvids.js.map