add BEM structure prototype
Add BEM readme
Merge branch 'master' of github.com:dkushnikov/repka-qa
add initElements method for refresh elements
block and element interfaces
Merge branch 'master' of github.com:dkushnikov/repka-qa

Conflicts:
	library/RepkaQA/BEM/Block.php
	library/RepkaQA/BEM/Element.php