bugfix and cleanup [Felix Uhl]
Using a thermal gaussian free particle distribution for initializing helium coordinates [Felix Uhl]
Fix for crash if incompatible options are given to PIMD code [Felix Uhl, Harald Forbert, Christoph Schran, Fabien Brieu, Ondrej Marsalek]
bug fixes in helium init to avoid undefined behaviour [Felix Uhl]
Useful initialization for helium droplet simulations, as well as refinement on metropolis acceptance for out of droplet steps [Felix Uhl]
adjusting accuracy and default parameters [Fabien Brieuc]
Removed unnecessary casts, trying to fix ref values [Fabien Brieuc / Felix Uhl]
Add the Quantum Thermal Bath Thermostat for Path Integral MD [Fabien Brieuc]