added on|off custom text
class 'switch-animate' added on when toggle clicked
Style fixes
Scope vars renamed to onLabel and offLabel
Updated minified version
fixed attributes
Updated minified version
Merge branch 'master' of https://github.com/arusanov/angular-toggle-switch

Conflicts:
	angular-toggle-switch.js
assign the on label value from the on-label attribute
why maintain a minified version?