1.0 release. Cleaned up code, reopened support for Gravity Forms 1.6... Since this is the 'absolute bare minimum product', it's fitting to call it version 1.0.

git-svn-id: https://plugins.svn.wordpress.org/gravityforms-hubspot/trunk@909798 b8457f37-d9ea-0310-8a92-e5e31aec5664