tweak README
use postgres as default database user
add .travis.yml
cache gems on travis
tweak database handling by travis
add badges from shields.io to README
add links to badges in README
add codeclimate token to .travis.yml
add codeclimate-test-reporter
use codeclimate for coverage tracking and use flat badges
Merge pull request #15 from optikfluffel/travis-codeclimate-coveralls

Setup Travis and Code Climate