Roller Missions

This mod adds roller missions into the game. A roller mission can be generated after a field had been sown.
You earn about 700 $ per hectar of the field.
Note:
As roller missions share some generation properties with fertilizer missions those two missions are working against each other in the generation. So don't expect to always get roller missions. Which one will be generated is randomized.
For support and enhancement requests please open an issue over on Github.
Changelog:
V1.0.0.1
- fixed a bug which caused sow and rolling missions to loop