Fix for unexpected request stream switching

Fixes NancyFx/Nancy#1334

This should fix the issue where a request stream is moved to a file
stream regardless of if you explicitly disable stream switching in the
request stream constructor.
Fixed Phillips rookie mistake ;)
Fixing indentation
Merge pull request #1335 from omockler/master

Fix for unexpected request stream switching
Added WithMediaRangeResponse ext to Negotiator
Made ResponseProcessor media range neutral