skeleton for sliders
setup the association between venues and slider
slider and slide models. setup rails admin config for all venues and slider
Inital commit for new frontpage config scheme

FrontPageConfig will have manye sections which in turn will have several
bars, shops,... as :venues

Also inludes empty stuff for test
To fully enable the new front page config scheme

Includes relation setups between models, and a lot of config for rails
admin.

usage:
FrontPageConfig.venues etc...
tidy up the relations
include slide CRUD and sort out relations
Merge branch 'slider' into sliderandfpconfig

Slider and frontpageconfig implemented.

Conflicts:
	app/models/bar.rb
	app/models/coffee_place.rb
	app/models/restaurant.rb
	config/initializers/rails_admin.rb
	db/schema.rb