Moved solr gem out of dev in gemfile.
Removed solr full text indexing as Heroku does not support it (freely).
Removed gem references for solr.
Removed solr files.
Added versioned api. Usage: default version: curl http://localhost:3000/api/products OR specify version in header: curl -H 'Accept: application/vnd.example.v1' http://localhost:3000/api/products