Merge pull request #8 from koxon/master

Major update
Update README.md
Cleaned up intentation in schemas
Have composer update installed dependencies
Merge pull request #9 from Ceache/feature/cleanup

Feature/cleanup
Add code quality tests to travis-ci
Merge pull request #10 from Ceache/feature/ci_improvement

Add code quality tests to travis-ci
Small updates
Start handling ffmpeg commands and presets
Added two new json parameters to input format: keep_ratio and no_enlargement