Vote type delay, code comments.

Added doc comments to server side voting API.
There is now a 4 minute delay between creating votes of the same type.
Shuffled some code around.
Made a StandardVoteType enum instead of string IDs.

Resources/Changelog/Parts/standard_vote_delay.yml

@@ -0,0 +1,4 @@
+author: PJB
+changes:
+  - type: Tweak
+    message: You can now only make the same type of vote once every 4 minutes.