removing compiled scss files and adding to .gitignore
modifying teamcity grunt build command and reverting validate:css changes
Merge branch 'master' of github.com:guardian/frontend into removing-compiled-scss-2

* 'master' of github.com:guardian/frontend:
  scss rem formatting
  Default script tag to async
  Force image box width in search results
  fix for gallery lightbox image sizes
  more open module style tweaks
  open-module style tweaks
  Correct bottom margin of open module
  Initial styling for open-module

Conflicts:
	common/app/assets/stylesheets/theme/_global-icons-sprite.scss
	common/app/assets/stylesheets/theme/_global-icons-svg.scss
Merge pull request #3512 from guardian/removing-compiled-scss-2

removing compiled scss files and adding to .gitignore