Bump to 2.3, better AR calls and fix font-awesome

Closes #165
make master dependend op Spree master again.
Fix update_all syntax for newer rails
Merge pull request #168 from zewelor/master

Fix update_all syntax for newer rails
Fix deprecations.
Grammar nazi update

Tytuł is spelled with u not ó
Conflicts:
	config/locales/pl.yml
add bin/rails so you can run the rails commands here again
make pages store dependend.
Bump to 2.4.0.rc3