Feature/update build process

[lifeiscontent]

@nicoschmitt This will update the build process for gulp.

here's what happens now:

1. everything is located in the src folder.
2. gulp build moves everything from src into build and compiles all assets.
3. gulp deploy:staging commits to nicoschmitt/openui/gh-pages
4. gulp deploy:production commits to OpenPoGo/OpenPoGoUI/gh-pages
5. all other tasks remain the same, e.g. (watch)

I haven't tested the gulp deploy actions because I don't have the rights to deploy to either of those branches, but I'm 90% sure it'll work.