Update to new candidate release (#1)

* Add all Menus and Context Menus

* Add real-time Font color change to GlobalFontManagerWindow

* Add Undo capabilities

* Adjust namespaces and folders

* Fix duplicated hierarchyChanged calls

* Add custom editor for TextData, add Reflection for property changes

* Change EnumFlag field to EnumPopup

* Add Color default and SaveOption defaults for TextData

* Add defauls for FontSize and LIneSpacing for TextData

Update README.md

Add credits.txt for font