Redesign Edit book
Add timezone to Application.rb
Gem Enumerize
Attach error messages after fails
bug: Order list not shown
Change BORROW_STATUSES with Enumerize
Change ORDER_STATUSES with Enumerize
Add Locale
Merge branch 'feature/Enumerize' into develop

Conflicts:
	app/models/book.rb
Fix bug: permission user to cancel order