fixes #567
update version info for dev 1.9.3.1 online
Merge branch 'Feature-CustomShapes' into dev_1.9

Conflicts:
	PowerPointLabs/PowerPointLabs/PowerPointLabs.csproj
	PowerPointLabs/PowerPointLabs/Properties/Settings.Designer.cs
	PowerPointLabs/PowerPointLabs/Properties/Settings.settings
	PowerPointLabs/PowerPointLabs/app.config
update version info for dev 1.9.3.1 offline