Fixes #476
Changed AspNetWriter.cs Flush to call Flush on reponse.
Changed OutputWriter to not Flush on Dispose.
Updated Tests to reflect desired changes to OutputWriter.
Removed IDisposable from IOutputWriter and all empty implementations.
Refreshing the readme a little bit
Links to wiki home and getting started
OWIN host now defaults to text/html for Content-Type
Upgraded to 2012
Rev'ing the nugets
rev'd nugets