add mouse-scrolling events to widgets
Make mouse wheel scrolling work with WPF backend
Remove obsolete comment.
Merge branch 'master' of https://github.com/mono/xwt into mouse-scrolling
Merge branch 'mouse-scrolling' of github.com:silwol/xwt into mouse-scrolling
Move MousceScrolledEventArgs class to Xwt subdirectory and add header comment.
Merge branch 'master' of https://github.com/mono/xwt into mouse-scrolling

Conflicts:
	Xwt/Xwt.csproj
	Xwt/Xwt/Widget.cs
Fix indentation according to coding styles and add copyright notice
[GTK] Fix widget embeeding issue

The NativeWidget property in WidgetBackend should return the root widget,
which can be an alignment introduced to add padding.
Improved implementation of Popover

Popover is now a subclass of XwtComponent and uses an
event sink to notify events. It can now be subclassed. Added
new Content property for setting the content widget.
[Mac] Improve margin handling

Widget margins are now applied by translating the origin of the
NSView by the amout of the left and top margins.
Add some padding to the popover sample
[gtk] Apply the container resurrection leak fix
Merge pull request #125 from antmicro/master

Window closed event
Merge pull request #124 from silwol/mouse-scrolling

Mouse scrolling
Merge pull request #126 from antmicro/rename_per_slluis_tips

Closed -> CloseRequested rename as per slluis' tips in #125.
[Label] Add WrapMode and implementation
[Gtk.LabelBackend] Fix compilation
[Mac.LabelBackend] Fix compilation
[Mac.LabelBackend] Tune a wrap a bit