Merge pull request #17 from phillip-haydon/JabbR

Refactoring for JabbR
- Cleaned up some RedirectToAuthenticate(..) code to make it more readable.
- Cleaned up some more Condition checks by removing not required WithException checks.
- Added some initial documentation to the Core library.
- Renamed the CheckCallback(..) method to be GetAuthenticatedClient(..). Sounds easier to read.
- :sparkles: Updated the ReadMe.md to display the correct NuGet image.
- :joy: Updated package version to 0.10.
- :joy:  Updated package version to 0.10.1.
Added Nancy Provider and NancyFX Test Web App
Merge branch 'master' into JabbR