Added settings for account if and account password to control panel
Change IBdaShopSettings to IShopSettings
Added settings in the control panel, and updated vocaulary to use those

Also: removed the "account ID", we will try to add these from
bda.plone.payment if possible,, it will be easier to customize from
there"
Merge pull request #9 from espenmn/master

Added new settings that are used for the control panel