Implements tracking bunch back in time; replace queues for time step size, num time steps and zstop with class that stores all these informations in a list; let the SOURCE element absorbe all particles in case of back tracking; disables automatic centering of FROMFILE distributions;

This MR is a somewhat random collection of minor fixes that were accumulated over the past months. 
It removes several unused methods, has some minor refactoring, and improves spelling and spacing.
In particular `src/Classic/AbsBeamline/Bend2D.cpp` and `src/Elements/OpalBeamline.cpp` were cleaned.
Some of the fixes were found with the static code analysis of #62.

See merge request !168

move openMode from Options to OpalData and pass as argument for LossDataSink

See merge request !167

Resolve "Probe Output"

Closes #344

See merge request !161

Resolve "CMAKE add on NERSC"

See merge request !165

Resolve "fixes for overloaded virtual errors on macOS"

Closes #333

See merge request !155

Fix for "improve ElementPositionWriter and SDDSColumn"

Closes #348

See merge request !163

improve ElementPositionWriter and SDDSColumn

See merge request !159

 format and precision of column value output

Resolve "remove obsolete build instructions and Makefile.def's"

Closes #345

See merge request !154

Resolve "Distinguish bunches in probe"

Closes #343

See merge request !151

Resolve "Wrong turn number at restart"

Closes #342

See merge request !150

SDDS Writers for Monitor Statistics and for Element Positions

Replaced hard coded SDDS writers for Monitor statistics and element positions with writers that are based on `SDDSWriter`.

See merge request !145

Resolve "Cyclotron Regression tests fail / broken after !129"

Closes #338

See merge request !146

This reverts commit f2d06cc2.

Resolve "binning parameter not properly initialized in constructor"

Closes #341

See merge request !149

remove deprecated StatisticalError tracker, part 2

Closes #330

See merge request !148

Resolve "review tools/BandRF/ascii2h5block_asgic.cpp"

Closes #340

See merge request !147

- use std::cout instead of Ippl's Inform class
- fixes for H5hut version 2

Gcc9 compiler warnings and breaks

This MR fixes some missing break statements and gcc9 compiler warnings.

This MR replaces C sort algorithms with std::sort solutions.

See merge request !142

Replace C sort algorithms with std::sort solutions.

Resolve "Cyclotron Regression tests fail / broken after !129"

See merge request !143