[Bf-python] moving to depgraph / getting rid of displist calls

[antont at kyperjokki.fi]

has anyone already looked into moving the api from doing displist calls to 
using depgraph? Ton said that the displaylists should be gotten rid off, so I 
guess we need to disable ~ depracate Curve.update() etc.

i'll work on it next week, at least to make curve tapering etc. work. 

~Toni