adding querystring access to ICurrentHttpRequest.  Closes GH-567
added ConnegQuerystring for later support of ?Format= conneg
added ConnegSettings for querystring conneg correction
using the ?Format=Json type conneg overrides.  Closes GH-564
refactored CurrentMimeTypeModelBinder a bit
custom mimetype correction policies.  Closes GH-560
added the autoFindPort flag to EmbeddedFubuMvcServer.  Closes GH-548