plugins - new type and two new plugins

Shipping was added to the left with support for both shipStation and
shipWorks.
domains and apps - bug fix

The git pull didn't work because it must be tied to a host/domain so it
has a place to pull to. Button was removed and documented why.
checkout - bug fix

Typo in cart messaging update.
plugins - make sure passwords are hidden

plugin data that is private needs to start with a tilde.