Merged reference into the bundle docs
Removed configuration reference section
Moved cookbook article to Content bundle
Moved tutorial to its own section
Updated outdated references
Merge pull request #551 from symfony-cmf/revisiting_structure

[WIP] Revisiting structure part 1
Fix Packagist link
Merge pull request #554 from Rioji/patch-1

Fix Packagist link
reflect the changes in the directory implied by the switch to PSR-4 compatible autoloading
document delete workflow
remove trailing blanks
document enable_initalizer
made proposed changes
made proposed changes
[#540] added versionadded
added version hint
Document MenuOptionsInterface and sonata admin extension
Add documentation about the 'namespace' option under 'metadata_cache_driver'

Conflicts:
	reference/configuration/phpcr_odm.rst
added docs for CreateBundle rest_force_request_locale config option