various fixes
introduced a build matrix, fixed failing test, removed bundler caching
add --format progress to rake in .travis.yml
removed build matrix (not much benefits anyway)
Merge pull request #401 from yggie/fixes

various fixes
fix for deployment bug
removed deprecated db:test:prepare command
fix for cucumber exit code
fixing weird travis bug
Merge pull request #403 from yggie/fixes

fix for deployment bug