Fixes KeyNotFoundException in logging.
Skips the UriIdentifier scheme workaround on Mono.

Mono doesn't support it.
Thanks to Justin Nel <dogbertuk2000@gmail.com> for helping identify this mono limitation.
Update to support Front_End_Https header used by some loadbalancers for SSL terminiation.  As Per http://en.wikipedia.org/wiki/List_of_HTTP_header_fields#Common_non-standard_request_headers
Accepted pull request #245
Fixes StyleCop break.
Adds another catch block to the logger initializer.
Remove the beta tag from v4.2 builds.
Incremented build version.
Adds OAuth2 packages to DotNetOpenAuth package.
Increments build version.
Fixes whitespace in .nuspec description.
Ignores NuGet packages.
Update samples/OpenIdProviderMvc/Controllers/OpenIdController.cs

Previous version did not work, if user had already authorized on provider, and use to authorizing on consumer ids with uppercase symbol, for example http://provider.com/user/AlGol 
Touch up on community contribution.
Merge in pull request #247
Merge remote-tracking branch 'aarnott/v4.1' into v4.1
Updates Twitter URLs.

Thanks Christopher Cook for the tip.
https://plus.google.com/116106034026223919199/posts/N422vX151Eq
Merge remote-tracking branch 'origin/v4.1' into v4.2

Conflicts:
	src/DotNetOpenAuth.Core/Messaging/MessagingUtilities.cs
Adds DelegatingHandler implementations for OAuth 1 consumers that sign outgoing requests.
Updated version number for v4.3 branch.