merge
Adding languagePicker control #WIP
Fix some css issue after merge
Merge branch 'dev-2.1' into language-picker

* dev-2.1:
  add style namespace to Wix.UI
  fix Number.isNaN

Conflicts:
	javascripts/ui-lib.js
Adding options from the plugin
Adding lodash for unit testing
Adding LanguagePicker plugin tests
Set the value as an object and not the given data from the callback
merge from dev-2.1
Merge pull request #30 from wix/language-picker

Language picker