Updated gems to work with ruby 2.1.1
Sorted icons by class name in cheatsheet, variables.less and variables.scss
Fixes #3048
adding yahoo and google brand icons #75
adding reddit and reddit-square #372
adding stumbleupon-circle and stumbleupon logos
adding delicious brand icon #372
adding digg brand icon #372
adding pied piper logos
adding joomla and drupal icons #221
adding new langauge icon into 4.1.0-wip
adding fax icon #981
adding building, child, paw, spoon, cube, and cubes icons
adding behance and behance-square #1493
fixing some brand icon categories, adding steam and steam-square icons #1035
adding car, taxi, recycle, and tree #60
adding spotify #330
adding deviantART #479
adding soundcloud brand icon #183
adding database icon #139
fixing issue where mail-reply-all is set up as an icon, not an alias