Stop changes in plant orientation

[Emblanc]

Reset of the orientation of the turtle each time the model draws a new plant : it prevents plants from changing orientation from one day to another
This will partially solve the issue #12 . We still need to add random to the orientation of plants, otherwise, they are all oriented in the same direction.

[pradal]

This can be done during when planting the seeds

[christian34]

Instead of using @r, you can also enclose each plant in brackets ([Seed] [Seed]...): that way the turtle goes to its initial orientation before drawing each plant and without being influenced by the number of axes / internodes in the canopy (and you are sure without testing tiller number that this will occur at each plant base)

[pradal]

We had exactly the same problems at the begining of Adel.
You can also set the random orientation for each plant ...