Ability to change content type on negotiator
Merge pull request #929 from garethrhughes/master

WithContentType extension for negotiator - Issue #872
Resovling issue #924
Merge remote-tracking branch 'upstream/master'
Move using-statements inside namespace
Merge pull request #930 from marcusoftnet/master

Fix for Issue #924
Merge remote-tracking branch 'nancy/master'