Update for Minecraft 1.7.10

Project
 - Updated usage of ScaledResolution to use minecraft instance instead of
   gameSettings.

Gradle
 - Updated Shadow plugin to v1.0.1
 - Replaced 'licenseFormatMain' and 'licenseFormatTest' tasks with
   'licenseFormat'
 - Split ForgeGradle/Magma dependencies into its own .gradle file hosted
   on obsidianbox.org

Signed-off-by: Steven Downer <grinch@outlook.com>
Remove magma_ prefix from gradle script

Signed-off-by: Steven Downer <grinch@outlook.com>