Bump xwt and md-addins to fix the build
[tests] Disable svn tests on yosemite for now.
[Docking] Track focus changing, rather than grab-broken, to determine when to close placeholder windows.

When we're dragging notebooks but lose focus due to alt-tab or something similar, focus events seem
to be more dependable than grab-broken events.

Fixes https://bugzilla.xamarin.com/show_bug.cgi?id=20989
Use a different shortcut for splitting documents

Fixes bug #21290 - Cmd-Shift-Left/Right breaks text editing
[Ide] Fix document focusing issue

When focusing a document with SelectWindow() make sure the document content
is created before exiting the method, since some add-ins depend on that.

Fixes bug #21291 - Regression: "Get More Components" throws
TargetInvocationException due to NullReferenceException in GetNativeWindow()
[Debugger] Fixing NRE Bug 21294
Updated references to xwt, debugger-libs, fsharpbinding, md-addins
[Ide] Fix crash in components view

Fixes bug 21292 - Regression: adding component throws InvalidCastException
from ICommandDelegatorRouter.GetDelegatedCommandTarget()
Removing something that was accidentally commited in 6d2343d38a60db85a0037c28fdfbccf10d45b4ec
Fix Close All Documents command

Fixes bug #21318 - Close all files tab context menu only closes that tab
[Icons] [NUnit] Color blindness tweaks
See https://github.com/xamarin/design/issues/242
Bump to the latest md-addins for iOS8 fixes
Updated references to xwt, md-addins
Update version-checks (Bumped md-addins)
Bump xwt to match md-addins
Fixed 'Bug 21237 - Underscores are removed from "Resolve" options'.
Fixed 'Bug 21233 - References DLL updated but code model not updated'.
Fixed 'Bug 21281 - Highlight usage doesn't update properly when
clicking on an already highlighted var'.
[Ide] Fix incorrect icon registration
[Ide] Fix icon registration issue