Merge pull request #1 from ruckus/master

Update from main fork
Add SyncActivity service; Add SyncActivityResponse model
Add attributes to retrieve
Ensure we cast to UTC for comparisons
Version bump
Update delete to use value to fix URI error
Merge pull request #63 from cwoolum/master

Fix Invoice delete method
minor: bumping rspec version, setting upg guard
minor: added BillPayment type support to QBO
Coersion of a Id (Windows/Online) in a String will return just the value. This way Id objects can be used in strin g interpolation and it will work as expected
major: added support for bill payments
Merge branch 'master' of git://github.com/apptopia/quickeebooks into apptopia-master