Restructured TODO, and added some new stuff

Signed-off-by: Gergely POLONKAI <polesz@w00d5t0ck.info>

TODO

@@ -1,30 +1,33 @@
 * book creation
-
 * event creation
-
 * "sticky" news flag
-
+* songs
 * news editor for administrators
-
 * PDF header fix
-
 * draft flag for Document and Article: only writer and administrators see it
     from the Document/Article list, in preview mode
-
 * full Document/Article list for administrators
-
 * polls
-
 * chat
-
 * Users' favourite forum topics
-
 * article categories
-
 * blog
-
 * site-based theme for ckeditor (both ui and the editor)
 
+Song
+    id
+    title
+    createdBy
+    createdAt
+    SongVersion[]
+        id
+        createdBy
+        createdAt
+        content
+
+News
+    lead
+
 Poll
     id
     createdAt
@@ -33,12 +36,11 @@ Poll
     updatedBy
     updateReason
     endTime (timestamp/date?)
-	answers (ArrayCollection of PollAnswers)
-	text
     anyoneCanAddAnswers
+    question
     multiselect
-	voters (is it really required?)
+    voters
-PollAnswer
+    PollAnswer[]
         id
         createdAt
         createdBy
@@ -46,7 +48,6 @@ PollAnswer
         updatedBy
         updateReason
         voters
-	poll (back-reference to Poll)
         text
 
 UserForumViewed