pesky changing ids bug squashed & added js libraries

Now that the bug is squashed, I no longer need to pin acid-state to a
specific version (I previously thought it was a bad version, it was
actually storing the StdGen in the DB). Also you can now get a
ballot (though not submit it).

rcv-site.cabal

@@ -37,7 +37,7 @@ executable server
   hs-source-dirs:
     src
   build-depends:
-    acid-state == 0.16.1.2,
+    acid-state,
     aeson,
     base,
     bytestring,