Both Impedance and WakeFunction now inherit attributes from ComplexData (component_type, power_x, power_y, ...)
Add a components property to WakeField which lists all components present (W and Z)
Adapt other classes using Impedance and WakeFunction to the change.

# Conflicts:
#	mbtrack2/tracking/__init__.py

Damper class are now active on a single plane at a time

Improve WakeFunction and Impedance methods to better take into account transverse wakes.
Update read_IW2D function to account for pandas library changes in the last versions.

[Fix] Bug when FIRDamper was used to track a Beam without MPI.
Various docstring modifications and code reformating.

remove FeedBack.py file

Add feedback.py file

Add a new example notebook on RF cavities and longitudinal beam dynamics which explain the RFCavity, CavityResonator and BeamLoadingEquilibrium classes.

Add cs_invariant to plot_beamdata, plot_bunchdata and streak_beamdata

Add n_bin optional parameter for CavityResonator used only if mpi is false.
Various docstring improvements.

Add Courant Snyder invariant monitoring in BeamMonitor
Add a bunch_cs method to Beam

Set hdf5 file to "a" mode fix an issue where the ProfileMonitor in MPI mode hung when writing data.
Remove flushing in ProfileMonitor.write() to avoid hung issuse in MPI mode.

Fix Monitor.track_bunch_data method to check that only the bunch which bunch_num is specified can write on the file
Modify the behaviour of BunchMonitor, PhaseSpaceMonitor, ProfileMonitor
Make the same modification within WakePotentialMonitor.
Style change to BunchSpectrumMonitor

Remove ipynb file from gitignore

move down init

Add requirements.txt for pip install
Update mbtrack2.yml to add accelerator-toolbox dependency for lattice import

Fix plot_phasespacedata and plot_profiledata
Change color map for streak plots for plot_profiledata, plot_wakedata, plot_cavitydata

Add utilities and instability folders
Change folder name from collective_effects to impedance

Remove untested code
Rename BeamLoadingVlasov to BeamLoadingEquilibrium

Change wake function in CircularResistiveWall to enforce fundamental theorem of beam loading.
Rework Resonator class to set manually time and frequency arrays and enforce fundamental theorem of beam loading.
Change to WakeField.impedance_components and WakeField.wake_components to allow methods begining by W or Z in WakeField subclasses.

Multiple hdf5 file can now be made without having to use MPI. This is achieved by clearing the file name storage every time the monitor is closed.

Changing Ncav after initialization now change the total shunt impedance Rs