refactor(grunt): simplify run:dev task
refactor(caching): only 1 css file, use grunt-contrib-cssmin to rewrite urls
refactor(grunt and caching): cache icon fonts, spritesmith and use icons from spritesmith for coins notification
refactor(caching): cache emojis and remove gemoji from bower
refactor(grunt): cache gifs
fix(typo)
Merge pull request #2827 from HabitRPG/paglias/optimizations

Optimizations