Update .gitmodules

Use HTTPS instead of SSH for compatibility.
Merge branch 'master' of github.com:RoyalMist/meteor-gsap
Update to 1.11.7. Also added EndArrayPlugin and Draggable files.
Setup GSAP to export to Server
Working client/server version of GSAP. Could do with some improvements for dependency management.
Merge pull request #3 from brentjanderson/master

Updates and plugin inclusions