Fix external stylesheet file name

This file should have been renamed in b6d5c298.

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Change journals schema to allow nullable user_id

This is a quick fix for the following test failures
(not seen in Rails 3):

    PG::NotNullViolation: ERROR:  null value in column "user_id" violates not-null constraint

Signed-off-by: Alex Coles <alex@alexbcoles.com>
[hack] Alias Journal constants at top-level

This is a quick work-around for apparently broken class reification
in the journaling system.

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Fully qualify ::Type class constant

See 0b941955.

Signed-off-by: Alex Coles <alex@alexbcoles.com>