add zoot-activate framework

This PR introduces the zoot-activate stack as the replacement for play-activate-mysql.

Related issues:

#707 - Fix the return json for single db query.
#659 - Disable the cache and use eager queries, producing the same amount of database roundtrips as the other implementations.

Permutations:

finagle-mongo
finagle-mysql
finagle-postgres
spray-mongo
spray-mysql
spray-postgres

Related frameworks:

http://github.com/fwbrasil/zoot
http://github.com/fwbrasil/activate
http://github.com/twitter/finagle
http://github.com/spray/spray
remove