account view, ModelChoiceField of costcenter, modify form layout

biscuit/apps/fibu/admin.py

biscuit/apps/fibu/forms.py

biscuit/apps/fibu/models.py

biscuit/apps/fibu/templates/fibu/account/edit.html

biscuit/apps/fibu/templates/fibu/account/index.html

biscuit/apps/fibu/templates/fibu/booking/check.html

biscuit/apps/fibu/templates/fibu/booking/edit.html

biscuit/apps/fibu/templates/fibu/costcenter/edit.html

biscuit/apps/fibu/templates/fibu/costcenter/index.html

biscuit/apps/fibu/templates/fibu/index.html

biscuit/apps/fibu/urls.py

biscuit/apps/fibu/views.py