added class Provincie refs #31
added function list_provincies refs #31
added function get_provincie_by_id refs #31
added function list_gemeenten_by_provincie refs #31
fixed indentation error
fixed some typos
added posibility for entering Gewestobject in list_provincies refs #31
changed gewest to gewest_id in list_provincies refs #31
added tests list_provincies refs #31
added tests get_provincie_by_id refs #31
set gateway for provincie in list_gemeenten_by_provincie refs #31
added tests list_gemeenten_by_provincie refs #31
added tests for class Provincie refs #31
extended provincie tests to improve coverage refs #31
Refactor provincie data to a list. Refs #31.
Remove unneeded property. Refs #31.
Merge pull request #32 from OnroerendErfgoed/31_add_provincies

Merged handling of Provincie into 0.4.0. Refs #31.