Merge remote-tracking branch 'gitextensions/master'
Reduce number of created pens and brushes by using system objects, and disposing existing ones.
Merge pull request #1651 from PombeirP/ReduceBrushAndPenUsage

Reduce brush and pen usage
Merge remote-tracking branch 'gitextensions/master' into BuildServerIntegration-plugin

Conflicts:
	GitUI/UserControls/RevisionGrid.cs
Add build status icons.