Extract method
Sketch out a method to get the running version
Add method to detect currently installed version
Make sure we're not referring to some other guy's app
Write an Test
Merge pull request #30 from Squirrel/get-local-version

Get currently running app version
Those clever Microsofties. Fixes #27
Bring back SingleGlobalInstance
Patch this back into UpdateManager
Fix some tests that were causing crashes on the finalizer thread
Merge pull request #31 from Squirrel/single-instance

Bring back Single Instance