add new features in scale_to() so user can run without an x-value - #289

add new features in scale_to() so user can run without an x-value#289

sbillinge merged 11 commits into

diffpy:maindiffpy/diffpy.utils:mainfrom

yucongalicechen:scaleto2yucongalicechen/diffpy.utils:scaleto2Copy head branch name to clipboard