Merge pull request #6 from BedeGaming/master

pulling in bug fixes for null content
updated readme with installation instructions
updated with correct handler line
added testing section
added info about how to get orchard tabs
major refactor to work around issue of message not being able to implement ITimelineMessage at the same time as displaying in a tab
authorizer and layers tabs finished
Merge branch 'master' of https://github.com/paynecrl97/Glimpse.Orchard
populated widgets tab
Merge pull request #3 from paynecrl97/master

pulling from original repo