Fix repo slug var name in build and deploy scripts.
Use ssh key of the travisci user.
Do not build/deploy pull requests and other branches than 'master' and 'develop'.
Merge pull request #69 from hbj/feature/deploy

Feature/deploy
Fix travis secure vars to use correct project name.
Merge pull request #70 from hbj/feature/deploy

Fix travis secure vars to use correct project name.