Make it deployable

[kairos34]

So many things to do making this project deployable:

1. Make all strings https://www.playframework.com/documentation/2.0/ScalaI18N
2. Write database evolution script when it is deployed https://www.playframework.com/documentation/2.2.x/Evolutions
3. Put all api-keys into app.conf file http://stackoverflow.com/questions/9857907/access-play-2-0-configuration-variables-in-application-conf
4. Add deploy to heroku button https://devcenter.heroku.com/articles/heroku-button