Updating readme to fix links.
Updating readme to fix links.

git-svn-id: 4ab5ab646b122833a49829b6a0f4a3be7d087ff7@535555 b8457f37-d9ea-0310-8a92-e5e31aec5664

pmcgriff/gravity-forms-sms-notifications,pmcgriff/gravity-forms-sms-notifications