Travis, hound, codeclimate integration

I'm planning to test following integrations:

 - [x] Travis-ci (result https://travis-ci.org/dice-cyfronet/atmosphere)
 - [x] Code Climate (result https://codeclimate.com/github/dice-cyfronet/atmosphere)
 - [ ] Code Climate tests coverage
 - [x] Gemnasium (result https://gemnasium.com/dice-cyfronet/atmosphere)

@nowakowski, @Nuanda, @djchrap, @bwilk please let me know what do you think about moving `atmosphere` into github and use free addons (like presented above). I'm waiting for your fast feedback because I don't want to waste energy for something that will not be used...
Prefer single-quoted strings when you don't need string interpolation or special symbols.