[RootWorkspace] Some generic file cleanup that optimizes:

Make some functions static, add Ordinal comparison argument.
[Verison Control] Main folder cleanup:

Removed redundant Using directives.
Added StringComparison arguments.
Removed unused private function from Repository.
Made some functions static.
[Version Control] Removed unused files AnnotateView and AnnotateCommand.

They have been replaced by BlameView and BlameCommand apparently.
Revert two of the static function conversions as they require API changes.
[Version Control Cleanup in Dialog and Views folders.

Remove redundant usings.
Add StringComparison argument.
Removed some redundant qualifiers from definitions.
Made some functions static. =D
Revert two more public API changes.
Merge pull request #380 from mono/someCleanup

Cleanup for Version Control and RootWorkspace