Enable use of fix halt for minimizations

Refactor kspace base class to have a settings() method

Implement dummy classes for deprecated and removed styles

Workaround for parallel_for() compilation issue with newer GNU compilers

Created new compute ADF for angular distribution function

apparently, data items used inside parallel_for() constructs have
rather strict requirements on const-ness, which is enforced by
newer GNU compilers. As a workaround we construct explicit const
copies of those class instances. This closes #1045

fix triclinic rounding bug for lib interface as well

Add src directory to PreventInSourceBuilds checks

added -restart2dump command-line option

cmake: prevent in-source build

bug fix for create_atoms single remap and triclinic