#17: add main page dimgem, create base views of dim and gem - ugly
 #17: create one view dimgem, removw dim and gem views
 #17: create simple ShowPostView, change names of templates dim, gem and gramma
 #17: finish ShowPostView, change urls
 #17: change vocabulary part in templates and urls
 #17: change curiosities part in templates and urls
 #17: change false_friends part in templates and urls
 #17: remove show_post view
 #17: add constants DIM and GEM
 #17: add template_type attribute to dimgem view
 #17: set context_object_name as 'posts' (name of queryset result)
 #17: change 'dim' and 'gem' in urls.py into constants DIM and GEM