Updated Gradle Build

- Added missing gradle files
- Just run the help_setup.bat
- Updated the ForgeGradle to work with my java 8
- Updated the forge version
Added Install Guide

- This took me an hour to figure out until I remembered how to do it.
- The Forge wiki guide is incorrect
Moved unneeded root files

- Trying to decrease the files new people see in the root
Add the distributed eclipse folder

This folder is distributed with the forge source and required for the
setup in eclipse to work properly.
I also added the .gitattributes file so the line endings for the folder
don't get changed.
This will also prevent strange diffs caused by line endings in the
future.
Update the installation guide

- Add a guide for simply compiling the mod.
- Added instructions for all platforms
- Added instrucions for IntelliJ
- Changed the eclipse instructions to a simpler way.
Update README.md

- Added an important step when creating a build
- Other small edits
Update README.md