Update for ForgeGradle -- WIP

Please DO NOT accept this pull request yet!
There's something wrong, and I don't know what it is... javac throws this:

com/pahimar/ee3/command/CommandEE.java:20: com.pahimar.ee3.command.CommandEE is not abstract and does not override abstract method compareTo(java.lang.Object) in java.lang.Comparable
public class CommandEE extends CommandBase {
       ^
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
1 error
:compileJava FAILED

otherwise, I think the scripts are fine.
The other option is to do like AbrarSyed, and replace all the ant buildscripts with the ForgeGradle buildscript, which might be easier.

https://github.com/AbrarSyed/SecretRoomsMod-forge