remove useless/wrong files in ink

docs.css is only for documents use, quick-start.css is a empty template let user to modify
Fix library minification
Merge pull request #2757 from PeterDaveHello/remove_wrong_file_in_Ink

remove useless/wrong files in ink
Use http://marijnhaverbeke.nl/uglifyjs to minify
Merge pull request #2788 from mcordingley/master

Fix library minification