[WIP] Feature/git helpers

Feature branch for:
- Git helpers
- "Gulp" deploy command (deploy CSS/JS files, which are compiled locally, to the target server)

More infos:
https://divio-ch.atlassian.net/browse/TECH-1
iiuc you need both compass and gulp, because there are some things done to the JS files (minification). @FinalAngel can you clarify?