Add menu item that renames or clones the currently open SpriteBuilder project

[LearnCocos2D]

Renaming a SpriteBuilder project from within SB currently isn't possible. A couple manual steps are necessary, with possibility for something to go wrong.

In reference to this question:
http://stackoverflow.com/questions/27067496/how-to-change-spritebuilder-project-name

[cocojoe]

+1 Thinking exactly the same thing last night, be good for sample projects / tutorials so user can rename project and go.

[LearnCocos2D]

Reminder for implementation: test renamed project with cocos2d update process to ensure it is working fine after renaming a project. In reference to: http://forum.spritebuilder.com/t/cocos2d-automatic-update-failed/2374