Updating so this will run in VS 2012 and VS 2010
Refactoring out building of backtrace to its own builder class to facilitate testing and SRP
Implementing the BacktraceBuilder so that it obtains the entire stack trace, not just the top most exception
Cleaning up tests
Merge remote-tracking branch 'jrolstad/master'

Conflicts:
	src/app/SharpBrake/AirbrakeNoticeBuilder.cs
Add MVC filter support