Remove canvas_course_creation from ext_tools project and instead include...

... django-canvas-course-site-wizard (same code) from external repo.  Update requirements files to include dependency.  Update name of module for url inclusion and add newly named wizard to list of installed apps.  Add some lines to .gitignore that will allow for developers to have their own requirements file for local development (in order to be able to include local directories).
Ahh, didn't notice the '!' in the diff view. Gotcha!