use dependency injection
Merge pull request #4 from jarcoal/patch-1

use dependency injection
implement two-way binding if the checkbox has an ng-model attribute
Merge pull request #6 from robfletcher/master

implement two-way binding if the checkbox has an ng-model attribute
added instructions to README about alternatives and releases
updated version on bower.json
Merge branch 'master' of https://github.com/servergrove/NgSwitchery

Conflicts:
	src/ng-switchery.js