Added current code

Added my current code, with just a temporary tractor which you can drive
forward and backward. That's it.
Current work before transfer to 1.7

Next update will be a port to 1.7
Fresh start for 1.7

Much easier than trying to fix everything.
Basic code skeleton

Added the skeleton for the new code, with nothing in it :)
Update to code

Did some work. Having trouble with the damage-based items, needs some
more work.
Did some work on items, mostly about their registration.
Finished rendering and spawning of tractors.
Added configuration and started entity interactions.
Did some stuff.
Finally got the orientation and rotation fo vehicles done.
(A lot of trial and error, but it works (kindof))
Started work on BlockFarmLand.
Started working on a simple method to recognize vehicles and extensions.
Did some more work on the extension/vehicle stuff.
Added a custom logger and added item textures to reduce console spam.
Added a creativetab.
Refactored some code, and worked on extension updates.
Started working on the farmland manager.
Fixed an infinite recursion derp and started testing some events.
Cleaned up the code. Replaced tabs with spaces.
Did some more work: custom messages and extension action.