Added support for multiple answers and added question pool counter.

conjugation/drill.html

@@ -21,6 +21,8 @@
         <button id="go">Go</button>
       </div>
 
+      <div>Question pool size: <span id="questionCount">Calculating...</span></div>
+
       <div class="options">
         <div>
           <h2>Conjugation types</h2>
@@ -62,14 +64,9 @@
         <label><input type="checkbox" id="trick" checked> Trick questions (answers may be the same as the given form)</label>
       </div>
 
-      <div id="te-notice"><small>
-        When the test refers to negative て forms, they are assumed to be ～なくて  and not  ～ないで .
-      </small></div>
-
     </div>
 
     <div id="scoreSection">
-      終わり
 
       <div id="history">
       </div>