Pressing Push To Arm again will disarm it

Closes #38
Fix Access Denied in ForegroundProcess (fixes #36)

Makes use of a Vista+ API which provides partial information access to
restricted processes querying elevated ones. Should solve the issue
Alpha-Kilo was experiencing.
Merge remote-tracking branch 'origin/feature/multi_keys' into feature/advancedsettings

Conflicts:
	Articulate/MainWindow.xaml.cs
Switch to advanced settings window
Version bump to v2.2.0