- use the X, Y and Z calibration values for axes and value calibration
- not sure we are actually supposed to do this but improves import of user
  provided images


git-svn-id: svn://svn.code.sf.net/p/gwyddion/code/trunk/gwyddion@16636 25697fe4-d644-49b8-9d30-be5465f2adf3