Added datum mutations

to space vines.

Now killing all vines of controller will spawn you a kudzu seed
All vines spawned by event can mutate
Only some vines from the pods grown in trays can mutate
Currently there are mutations that make you cut yourself on thorns, that consume oxygen, nitrogen, CO2 and plasma, and block the way
Mutations change vines hue
Mutations happen randomly
Mutations do stack
Vines get the colour of the last gained mutation, coz trying to make "mean hue" ended up being bad
Will add some more mutations, and plant analyzer handling
500 vines on station doesnt lag in the slightest, but that may be just my computer