added a function to allow user to use a mixin to insert a single icon into compiled CSS instead of the full icon list, therefore allowing customization without editing icon list.
Merge branch 'hotfix/2.5.5' into develop
Merge branch 'icons' of github.com:wadehammes/Gumby into wadehammes-icons
Added option to specify multiple icons or 'all', moved icon function/mixins to functions directory, moved entypo import to gumby.scss and used icons mixin in _base.scss
Merge branch 'wadehammes-icons' into develop
Merge branch 'hotfix/2.5.6' into develop

Conflicts:
	css/gumby.css
Optional gumby-self attribute on toggles/switches, toggle trigger method adapted
Switch method adapted to support self attribute
Updated target id self is true for toggles and switches
Rebuilt gumby.min.js with Claymate
Refactor touch event initialisation to allow support for touch + manual init
Merge branch 'feature/tapinit' into hotfix/2.5.9
Rebuilt gumby.min.js with Claymate and removed test link from ui.html
bump bower version number
Merge branch 'hotfix/2.5.9'