Removing unused usings
Added new method RefactoringHelper.Move that moves file from old path by new path and update document class if it was moved
Using RefactorungHelper.Move(...) for move files
Using RefactorungHelper.Move(...) for move files
Removing extra local variable
Updating documentation
Merge pull request #227 from SlavaRa/CodeRefactor-improvements

Updating document class if it was moved