fixed sqlalchemy declarative import in base.models file

[jstacoder]

trafficstars

declarative was misspelled, causing an import error, that kind of thing can really trip up newbs. Especially with huge complicated libs like sqlalchemy.

[jstacoder]

also, looking through my commit, i guess i made it bootstrap3 compatible, and i took out the flask-assets stuff, not a fan of that library.