Adds .gitignore with '/vendor/' and 'composer.lock'.
Adds bootstrap and index-action for Sass-module.
Adds leafo/scsccphp to composer.json.
Adds sass-compiler module as in less-module.
pdates .gitignore to ignore 'composer.lock', '.idea/' and '/vendor'.
Merge branch 'feature/sass-module'

* feature/sass-module:
  Adds sass-compiler module as in less-module.
  Adds leafo/scsccphp to composer.json.
  Adds bootstrap and index-action for Sass-module.
  Adds .gitignore with '/vendor/' and 'composer.lock'.

Conflicts:
	.gitignore