Change TextViewRole on Plain-Text Completion Command Handler so that it does not fire on the Nuget Console
Minor code cleanup + fixing exceptions with NuGet management console (Issue #55)
Fix highlighting of closing XAML tags (Issue #57)
Fix key processor so that it handles key events from the embedded peek-definition window, and ensure that the RainbowHighlight gets instantiated for the window as well
Ensure all event handlers are properly unhooked in the DevMargin to try to avoid possible memory leak
Change slightly the bounds used for the geometry of the rainbow highlight so that it doesn't look ugly when it is done on lines containing the code lens adornments
Do not draw the rainbow highlight on top of the peek definition window
Simplify the rainbow highlight code to use a Path shape instead of a drawing image
Substantially simplify the current column highlighter code