Registration process and pin loaders page

1. Update the DB by executing:
alter table users add locale char(2) not null default 'en';
This is already in the DB script, at the end.

2. This provides an upgrade to the registration process, including registering/login with facebook and google+.

3. This provides a pin loader page, available at:
http://mypinnings.com/admin/input/
This allows to upload 10 products at a time to one category.