New sample to show the use of tracing and errorlogging in a provider hos...

This is a sample that shows how you can trace messages and methods using trace.axd.  It also shows how you can log a error to Sharepoint that shows op in the app details page.

Small comment: The sample shows up on the github webpage as samples/Debug.Tracing/Debug.Tracing, instead of samples/Debug.Tracing. I guess I created my folder structure to deep. Since my Github knowledge is not that great, I hope you can fix this for me. Thanks already!