Add custom UnitRegistry to handle scaling factors more cleanly#212

kroenlein merged 2 commits intomainCitrineInformatics/gemd-python:mainfrom

bugfix/spt-1311-accept-scaling-with-underscoreCitrineInformatics/gemd-python:bugfix/spt-1311-accept-scaling-with-underscoreCopy head branch name to clipboard