Add p2m in compute_potential.pyx
Try to finalize cloud; not working for now.
Bugfix in scatter_to. Further test cloud tracking.
First version looks-like running e-cloud.
Add new beams class/interface. Prepare space charge module.
Move beam.py to beams.py due to name conflicts; add some small fixes. Move cloud tracking to cloud class. Work on modifications; numpy copy problem.
Work on cloud tracking; first real tests.
First version of spacecharge class.
Add __init__.py in spacecharge.
First pass of benchmark against headtail.
Work on new implementations of beam and slices.
Work on Slices class in beams.py. Restructure and clean up slice_constant_space.
Work on constant charge slicing. z_bins fine so far; z_centers not quite clear.
Clean up a little in new slices class. Test ongoing.
Work on slice_constant_charge; still with wrong particle numbers.
Merge remote-tracking branch 'origin/kli' into dquartul

Conflicts:
	impedances/wake_fields.py
	main.py