Update LICENSE
Update README.md
Update README.md
Update README.md
Add missing fields and required file
Do not include empty fields in xml
Add validation for required fields when inserting/updating
Add Transaction Category List Item
Add configurable request url and list item
Invoice default transaction type to s
Required fields for Item Invoice Item
Add Tag and Tag List Item
Error results for all/where
Allow multiple entities to be posted
Check if class_required hash exists
return list of contacts from saasu as Contact objects instead of ContactListItem
Replace present? with any?
move instert_and_email to invoice class (since it only applies to invoice)
Merge commit 'bcb9d870b4bb6abf5afaf42b8f200c42e45254f9' (choodur)

Conflicts:
	lib/saasu.rb
	lib/saasu/base.rb
	lib/saasu/invoice.rb
	lib/saasu/service_invoice_item.rb