Start work on adding support for mnemonics
[WPF] don't fire Window.Shown event until window is loaded
Finish implementation of mnemonics for Buttons and MenuItems
Add Mac MenuItem of UseMnemonic
Use string builder
[Xwt.Gtk] Fixed bug in text layout backend handler coordinate
transformation.
[build] Add another ReferencePath for compilation purposes

When building our private code we still need to use the monomac
found in the monodevelop build tree.
[build] Support building in the xamarinvs configuration too

In this scenario we look in for a sibling monomac checkout when
Xwt.Mac is inside md-addins.
Fix Mono.Cairo warnings
[build] Make sure our build magic is both explained and easy to find

Pull our build magic into a separate file with a nice big comment
explaining exactly what we use it for.
Merge pull request #234 from dlech/mnemonics

Implement mnemonics
[Xwt.Mac] Add embed backend for NSView
Added checks for unsupported base constructor calls

The new InvalidConstructorInvocation exception is thrown when you call
a constructor of a base class which takes arguments. This is in general not
supported since setting properties usually results in virtual methods being
invoked, and those virtual methods may be override in subclasses that have
not been yet initialized.
Added RoundRectangle drawing method
Added overload for Color.WithIncreasedContrast
[WPF] Enable WrapImage to take an ImageSource
Fix PlainTextFormat to emit an implicit paragraph around the content (required by WPF)
Add label sample that uses a link
Add support for links in formatted text
[GTK] Add support for links in formatted text