Online: Moved Shipping and Billing properties from the Invoice model to the InvoiceHeader model where they belong.
Merge pull request #58 from epugh/master

Employee model and service objects.
Merge pull request #59 from epugh/master

added spec for Employee service
Remove the validation from the included module as some Models that its mixed into do not actually possess the :name attribute. The validation on :name should be pushed down to the actual Models that have that attribute
merged from ruckus/quickeebooks master