Stubbing out exception helper method on ExceptionLogService and basic usage in http handlers.
Stubbing out LogException methods on RockBlock and RockPage.
Merge branch 'develop' into feature-jo-exceptionlogger
First working version of exception handling.
Merging Global.asax.cs's LogError logic with ExceptionLog.LogException, including writing to file if unable to write to db.
Cleaning up comments. Adding checks to ExceptionLog population function for ServerVars, Cookies and Form items.
Merge branch 'develop' into feature-jo-exceptionlogger