make_up for teachersshowO
edit new and show teachers views
some refactoring
make_up to genres_index
add show_genre_view
some refactoring in genres_index
some adds
Merge branch 'development'

* development:
  some adds
  some refactoring in genres_index
  add show_genre_view
  make_up to genres_index
  some refactoring
  edit new and show teachers views
  make_up for teachersshowO