Strip unwanted characters from the ISBN

Allow people to enter with or without hyphens.
Merge pull request #10 from jabley/add-new-book-tweaks

Strip unwanted characters from the ISBN
Upgrade rails
Merge pull request #12 from jabley/rails-3.2.18

Upgrade rails
Bump gem dependencies to use Rails 4.0.x
Set explicit methods for match route
Remove vendor/plugins
Add new-style usage of Bundler.require
Switch to using strong parameters
Tidy up models

- Make sure scopes are called with a lambda
- Remove use of .all on scopes
- Make .to_param return a String, not a Fixnum
- Remove a mass-assignment test which is no longer valid
Bring environment config up-to-date
Fix copy_actions_test
Fixes for the paper_trail changes
Remove some .gitkeep files