removed gamma in deltaE ~ deltap relation, bug correction.
merged with kli
kli full merge
creating minimal environment
added longitudinal space charge and general Element with printing function. every element that is possibly a part of the tracking map should be derived from the new class Element.
new slicer from Michael
corrected and sped up long_space_charge
added transverse space charge detuner, to be tested thouroughly now
minor changes
generators.py added from kli branch
Michael and Adrian implemented changes for slicer, which were discussed with Gianni and Kevin
Add bug fixes in new slicing module and adapt naming conventions in cython stats.

Conflicts:
	cobra_functions/stats.pyx
	particles/slicing.py
Replace old slicing test and update to match new slicing module.
Rename folder pre-unitTests/slicer to pre-unitTests/slicing.
make pre-unitTests executable
add python_path into test_slicing.py
remove not_used_bunch.py
checkout kli:particles/particles_2.py into particles/particles.py
deleted match.py
added Particles.get_slices and clean_slices, inserted cleaning of slices into some longitudinal elements. What remains: clean up simple longitudinal modules and unite them into simple_longitudinal_tracking.py