Making the "about" app database driven

Major changes: 

* created models for all of our about pages except sponsors (can now update team, board, mission, and press articles from admin page)
* moved all "about" stuff into it's own app and out of the "main" app

__not ready to merge__ because: 

1. Need to add ordering to the "AboutSection" models 
2. Need to style press articles page
3. Overall major cleanup of about page less necessary. 

Will take about 30 more min tmrw! Just need to take off so I can do some exercising ;) 

@wangguan59 take a peek in the meantime let me know what you think! not many stylistic changes just functional.