changed behavior after unloading combine

fixes #91
fix activation for combine in mode 6

should activate/deactivate/open pipe/close pipe automatically
fixed problems with forage wagon in mode6

fixes #53
merge combine.isCornchopper with cornchopper
mode 2: lmX fix for attached combines

- for now only support for "Grimme Rootster 604" and "Grimme SE 75-55"
- have hard offset of -4.3 / +4.3
clean up mode 6
include offset in workWidth line
improved mode 7

combines and harvesters align now better after unloading
fixes #48
last try to fix mode6 issues
bugfix
support for horizontal offset in mode 4

closes #94
mode 6: set abortWork for bale loaders

possible fix for #64
fix for crash when combining courses
Support for Fuchs liquid manure barrel

the Stefan Maurus one, of course
Support for Tebbe HS180 manure spreader

the one by Stefan Maurus
fixed possible crash with attached combines

check if trafficCollisionIgnoreList exists before adding to/removing
from
fixed drive(110) issue
RC
bugfix for RC
Merge pull request #4 from netjungle/master

Update to v3.3