Updated spree to point to 1.3

Signed-off-by: Nathan Lowrie <nate@finelineautomation.com>
Got rid of the markdown route now that we are not longer using it.

Signed-off-by: Nathan Lowrie <nate@finelineautomation.com>
Updated gem to be compatible with spree 1.3.

Signed-off-by: Nathan Lowrie <nate@finelineautomation.com>
Slight tweaks with the uploads form to style it like the product images form.

Signed-off-by: Nathan Lowrie <nate@finelineautomation.com>