tweaks docs a bit

This makes the distinction between the serializer standalone library, and the integrating bundle a bit more explicit.
makes deps a bit more precise

Marks all versions of serializer bundle prior to 1.0-dev incompatible with this version of the rest bundle.
Fixed typo.
Merge pull request #348 from blaugueux/patch-1

Fixed typo.
Made xml loader compatible with symfony 2.2
Adds Content to the list of uncountable words
Merge pull request #350 from Bendihossan/add-content-to-uncountables

Adds Content to the list of uncountable words
Merge pull request #349 from mvrhov/sf22Compatibility

Made xml loader compatible with symfony 2.2
remove re-definition of static vars
Merge pull request #352 from bendavies/fix-pluralization

remove re-definition of static vars
Fix. Add use statement for @QueryParam
Merge pull request #354 from spolischook/master

Add use statement for @QueryParam in the Documentation
Return a 204 (Codes::HTTP_NO_CONTENT) when content data is provided.

http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.2.5
http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.5
made status code configurable when view data is explicitly null
made serializing null values configurable
some changes
Merge pull request #356 from j/empty-responses

Empty responses
updated configuration reference
Merge pull request #357 from j/configuration

updated configuration reference
[BodyListener] Reuse contentType variable