move protect_from_forgery to the beginning of the before_filter chain as per the recommended rails practices

Use the equivalent db:migrate:plugins instead that is provided by the
engines plugin directly.

Fix failing tests because of missing journal fixtures and indeterministic behaviour of .find(:first)

Contributed by Ivan Cenov.

Contributed by Jan Schulz-Hofen

Contributed by Holger Just

1.9.2 removed String#is_binary_data?

Some database adapters are returning strings unencoded correctly (sqlite3-ruby)

This will allow the Journaled object to reliability set the fields on the Journal
without calling init_journal (which is a before_save hook and shouldn't be called
directly).