Add Grunt configuration for the production build, fix project-light stylesheets,
move project-light images to '/public/images/interface', only include the css
for project-light components we use.
Merge branch 'master' of https://github.com/CUL-DigitalServices/libraries-gateway into frontend-build
Update the readme file to reflect latest change to the Grunt config
PR follow-up: add semicolon at the end of a line
Merge pull request #11 from timdegroote/frontend-build

Application can now be built using production builds (hashing, minification...)