Pyheadtail

Added 64 bit compatibility to aperture module.

- **New feature: apertures and particle losses.**
- In Wakes module:
Make function_longitudinal(..) and function_transverse(..) public and
clean up redundant code.
- In Particles: add(..) method now takes dictionary as argument.

- In AmplitudeDetuningSegment: Include alpha_{x,y} in
calculation of transverse action.
- In Resonator and ResistiveWall WakeSources:
Rename Yokoya_Z parameter.
- In Resonator: clean up methods _function_transverse and
_function_longitudinal (remove R_shunt, frequency, Q from args.
Access them directly using self. ...).

Replace reference in the particles update method by copy.
Does require numpy arrays at this stage.

Improved matching using semi-analytic evaluations for better
convergence of longitudinal emittances.

Bugfix longitudinal broadband resonator
Added transverse space charge (needs PyPIC)
Added transverse E field map (needs PyPIC)