Allow importing of courses that don't have the expected path/filename structure for problems and html

This cleans up remaining issues w/ https://github.com/MITx/mitx/pull/155

This improves the performance of the save to github for the cms
(had some minor requests for clarification, but that's all)

Temporary fix to allow pages that inherited the marketing template to display

removing {marketing,marketing-ie,print}.scss from PIPELINE_CSS

* Updated student.models.UserProfile
* Added migration to add: gender, date_of_birth, mailing_address, country, telephone_number, occupation

Make collectstatic run to completion

Dormsbee/multicourse