Issue #181: Better measurements standard. (dismine/valentina)

New issue 181: Better measurements standard. https://bitbucket.org/valentinateam/valentina/issue/181/better-measurements-standard

Roman Telezhinskyi:

New standard:

  • Have reserved measurements names that program can translate.
  • Have very simple structure for measurement .
  • If program will find known name she will translate it.
  • Change dialog creation list of measurements.
  • File can contain only several measurements instead of all list that we know (support).
  • Allow don’t use measurements file at all.