update for cmf_request_aware change in https://github.com/symfony-cmf/CoreBundle/pull/56
Merge pull request #176 from symfony-cmf/request-aware

update for cmf_request_aware change
describe basic blocks a bit more in detail
Merge pull request #177 from symfony-cmf/block-type-doc

describe basic blocks a bit more in detail
Proposal for bundle standards document
Updated bundles doc