*** HOW TO INSTALL ***
For Mod Users:

Download the latest installer from http://files.minecraftforge.net and follow instructions given by the installer.

For Mod Devs:

Download the latest Forge source distribution from http://files.minecraftforge.net and unzip it to a folder.
Open a command prompt, navigate to the directory where you unzipped the Forge sources, and run:
If you have Gradle: gradle setupDevWorkspace
If you DO NOT have Gradle installed:
Windows: gradlew.bat setupDevWorkspace
MacOS/Linux: gradlew setupDevWorkspace

Requirements:
  You must have a JDK installed and accessible, there is a big in java 1.6_21 that 
  causes compile errors, just update your jdk to fix them.
  Optionally, you can install Gradle from http://www.gradle.org/ .