Remove riak config files

- app.config
- (old) riak.conf
- riak nginx config
rm riak tests

rm riak db config
rm riak-js from package.json

rm node_modules/riak-js
rm shrinkwrap

I don't really see the need since we are tracking node_modules
Travis rm riak as a service required
Merge branch 'feature/rm-riak-assets' into dev

Fixes #18
0.1.8