Additional feature for renaming file should rename class

[jinujoseph]

Related to #109

• [ ] It's common to put a '.' or '+' between nested classes, ie "Outer.Inner.cs", we should rename all of these as well.
• [ ] We should handle generics, ie when 'Foo`1.cs' or 'Foo.cs' is renamed, let it rename a type called Foo<T> in the file.
• [ ] If someone copy and pastes a file, we should let you rename the copy 'Foo - Copy.cs' -> 'Bar.cs' and only update just the type within that file.
• [ ] Prompt user for rename based on option
• [ ] Add "Remember this" to the prompt, so that you have uncheck that box from the dialog itself.