initial update to 1.7.10, move to ForgeGradle

This is an initial update to ForgeGradle, integrating some of the work already done by others.  In the next few days, I'll be diving headfirst into the APIs that OCS depends on, to get all of the appropriate changes made.  Once that's done, testing can begin on beta builds and we'll head toward a full release.

I'll be updating the README.md to reflect the change in the build system.