test(test_project): add customers/reps apps and sample models
chore: ignore default db.sqlite3 file
fix(static/jquery): use easy_select2/vendor/jquery in our form

since it's already included as dependency, might as well bind
against and use a single jQuery (v2.0.3) library.
test(customers): add an FK and some sample advanced_filter_fields
Merge branch 'master' of github.com:modlinltd/django-advanced-filters