Migrate SpatioIO-Compat to Minecraft 1.7.10

General:
* Updated Gradle Wrapper to 2.1
* Using last stable Forge being 10.13.2.1230
* Adding automatic download of AE2 rv1-stable-1
* Updated .gitignore
* Reworked module logic (details further down)

Integration:
* Tested BigReactor
* Disabled BloodMagic due to chance of world corruption
* Disabled OpenMods because it has yet to be tested

Module Logic:
Modules are now implementing a common interface.
The interface provides next to the old way to register the module
a direct access to the mod's ID.

To register new mods,
add it to the modules field upon construction of the mod