[Icons] New and updated breakpoint icons:
* breakpoint-disabled
* breakpoint-invalid
* breakpoint (updated)
[NuGet] Fix package source timing out on Windows.

Repeatedly switching between the package sources in Preferences and
the Add Packages dialog would stop returning any packages.

The problem seems to be that .NET has a limit on the number of
concurrent http requests to the same url and the code was not
disposing the request causing this limit to be hit. Once hit
all requests would never be sent and eventually time out.
[Icons] [MonoDevelop.NUnit] Run unit tests icon
[Icons] breakpoint-clear-all changed to generic clear
[NuGet] Fix null reference exception when removing missing package.

Show more information in Package Console when an attempt is made to
remove an unrestored package.
Handle invalid packages.config file errors when updating/removing
a package.
bumped debugger-libs
[Debugger] Replaced loop with simple math
bumped debugger-libs
[Debugger] Replaced another loop with simple math
[NuGet] Move Solution pad Add Packages menu inside Add menu.

To open the Add Packages dialog now, right click the project in the
Solution pad, select Add, then select Add Packages.
[Debugger] Possible fix for bug #18326
[Debugger] Improved DebuggerVisualizerDialog usability

Fixes bug #17274
[Debugger] removed unneeded check
[SourceEditor] Separated scrollbar and quick task strip.
[Decompiler] Synced icsharpcode.decompiler.
[NuGet] Hide Packages node in Solution pad if project has no packages.

Check for the existence of a packages.config file before showing the
packages node in the Solution pad.
[WebReferences] Added choice for Async.

Web References support not generating Async, generating Async or
generated Task-based.
Bug 16860 - Disallow adding SOAP web reference and force-enable event-based async in PCL
[MonoDevelop.Ide] Fixing wrong position of the tree popup button
[MonoDevelop.Ide] Changing browser pad and selection colors