[Bf-python] Particles

[Campbell Barton]

Hey all..
I just experimented with particles today with mixed results.

getParticlesLoc worked for point particles.
for particels with length it used the starting point only. (length is 
ignored)
and for static particles it didnt return anything.

Could these improvements be good?
* Use Vectors for particle locations instead of lists of 3 floats
* for particles with length- and static/animated particles, make each 
strand a list of vectors.

- Cam