Got rid of some useless cruft that we never ended up using
Merge pull request #209 from etingel/cleanup

Got rid of some useless cruft that we never ended up using
Added userId to data passed on by endpoint
Created migration for attaching userIds to votes and provided a default value to old DB entries
Added basic limiting logic to recordVote and deleteVote
Merge pull request #208 from etingel/sessions

Basic session support