Completed gradle build script

Gradle downloads dependencies and builds separate jar files.
Also:
 - Update to latest recommended forge (10.12.2.1121)
    - Made changes for the latest forge
 - Update gradle wrapper and included gradlew.bat
 - Travis CI now uses gradle
 - Re-organized mod .info files
 - No more ANT
Fix naming of some items
Merge pull request #460 from simon816/1.7-port

Gradle build script