fixed some mode6 issues

fixes #77
fixes #39
fixes one of the mode2 colli -problems
saves recources while registering combines
hmmm
bugfix
more space behind combine for Tectron and Maxtron

fixes #81
AutoTurnRadius suport for 4Wheel-steered tractors
Merge pull request #1 from netjungle/master

Update to latest version
Merge pull request #2 from Courseplay/master

set private Development up to date