[Refactoring] Fix ICompilation creation in CodeAnalysisBatchRunner.
[Refactoring] Fix usage of CodeAction.Run.
[Refactoring] Add new helper method RefactoringService.ApplyFix (CodeAction, object).
[Refactoring] Use a better ICompilation in BatchFixer.
[Refactoring] The CodeAction menu now lists batch fix items together with the settings in a common submenu.
Merge branch 'simonl/flexible-grouping' of github.com:mono-soc-2013/monodevelop into flexible-grouping

Conflicts:
	main/src/addins/MonoDevelop.Refactoring/MonoDevelop.CodeActions/CodeActionWidget.cs
	main/src/addins/MonoDevelop.Refactoring/MonoDevelop.CodeIssues/CodeAnalysisRunner.cs