implement BlockContext
BlockContext: ActionBlock + RssBlock
BlockContext: update tests
BlockContext: action block config - PHPCRBlockLoader
drop symfony 2.1 support + added changelog
BlockContext: implement in caching adapters + RssController
Remove settings resolving from PHPCRBlockLoader + added bundle settings
BlockContexr: add cmf context manager
updated for upstream changes
Merge pull request #61 from symfony-cmf/block_context

Block context