add Class#create creates indivisual class test
add create Class inheritting from other class teset
add enchant.Class test
Merge branch 'feature/mocha_class' of https://github.com/wise9/enchant.js into feature/mocha_class

Conflicts:
	tests/mocha/enchant.js/test_class.js
Merge pull request #244 from wise9/feature/mocha_class

Feature/mocha class