Remove NLog dependency & other special logging stuff. Now just uses the Debug Window.
Remove binaries from repo.
Allow apps to specify a local appcast by using a file:// URL. Make test app use the sample in the Extras directory.
Adds single auto-check, controlled by CheckOnFirstApplicationIdle, which is true by default
Adds "toast" pre-notification to be less obtrusive cotnrolled by UseNotificationToast, which is true by default
Add SampleApplication to help new clients see what to do.
With this commit, I'm moving away from the StartLoop() approach, which may eventually just be removed.