Add options to plot beamdata vs index and in streak plot mode
Add setting of colorscale for plot_cavitydata

Fix bug when buffer_size=1 in TuneMonitor by switching to init buffer_count to 0. Now total_size should be 1 less.
Improve plot_tunedata

Fix plot_profiledata error due to change to center instead of bins
Fix plot_cavitydata legends and turn selection

Fix profile monitor
Add detune to cavity monitor

Add a dict_dtype optional parameter to Monitor.monitor_init to allow to choose the dtype to use to save the data.
Improve CavityMonitor to allow for saving beam and cavity phasor for all bunches
Add a plot_cavitydata function
Fix a bug on CavityResonator.track -> nturn += 1 at correct time
Change CavityResonator.track to allow for monitoring the cavity/beam phasor at each bunch

Change back invariant name to cs_invariant
Simplify SkewQuadrupole track method

Add tracking to CavityResonator based on the mbtrack implementation but using a analytic formula for speed-up
Add method to Beam to share longitudinal distributions
Add methods to Mpi to look for next and previous bunches
Add start of a CavityMonitor, to improve to deal with multi-cores

Remove for-loops inside the function.

- cs_invariant method in Bunch is renamed to 'action'.
- Action is now saved together with BunchMonitor and can be plotted in plot_bunchdata

Main change
- Variable local_beta, local_alpha, and local_gamma are made property objects.

Minor change
- Add an option to plot phase space in different style.

Bugfix due to switch to numpy arrays.
Allow to save less mp than the full number in the bunch.

Bugfix2 : PhaseSpaceMonitor

Change track method to allow for Beam objects
If pynaff can not find the tune, the tune value is nan.
Nanmean and nanstd are used to avoid to bias the tune value.
! Untested if some particles are lost !

WakePotentialMonitor now use interpolation on a fixed grid to be able to save the wake potential data (which size change from turn to turn).

Correct scale in plot_wakedata
Avoid circular import by moving import in function

- Option to plot bunch current on x-axis has been included in plot_bunchdata.
- Option to select the plot size for plot_phasespacedata has been added.

Remove tools.py to avoid circular import problem with wakefield.py -> merged into wakefield.py
Remove machines folder to save machine data in a seperate git instance
Rework import so the code can be used as independant module mbtrack2

- Shift of x-axis when start is changed has been fixed.
- Added option to plot other dimensions apart from 'tau'.
- Improved code conciseness and efficiency.

A new function for plotting profile monitor has been added. Two types of plot can be obtained : bunch profile evolution and streak plot.

Fig bug for ProfileMonitor if dimension is not in list

Plotting routines now return figure object.

Add ProfileMonitor to save bunch profile
Add a track_bunch_data to Monitor class to group the code of track methods from BunchMonitor and PhaseSpaceMonitor
Implement BeamMonitor for the case without mpi
Remove hard coded h=416 ! in BeamMonitor

Two new plotting routines have been added
- plot_optics for plotting optical variables (beta, alpha, gamma, despersion)
- plot_beamdata for plotting data recorded by BeamMonitor