bumped version number
Merge remote-tracking branch 'upstream/master'
update appveyor version
added inspector nullable value support per issue 97
updated appveyor versioning
added nullable double value to the demo
Merge branch 'master' of github.com:mwpowellhtx/gemini

Conflicts:
	src/Gemini.Demo/Modules/Home/ViewModels/HelixViewModel.cs
	src/Gemini.Modules.Inspector/Inspectors/TextBoxEditorView.xaml
provides a better separation of concerns
revised working branch approach
verified appveyor yaml
Merge branch 'master' of github.com:tgjones/gemini into working
Merge branch 'master' of github.com:tgjones/gemini into working
patched nullable property demo example
Merge branch 'master' of github.com:tgjones/gemini into working
added intermediate PropertyChangedBase for Caliburn.Micro concerns
Merge branch 'master' of github.com:tgjones/gemini into working
Merge branch 'master' of github.com:mwpowellhtx/gemini into working
merged updated inspector view
merged from upstream master
merged with upstream master