ADD: functions to return whether given format ID corresponds to image of xform


git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@4817 42a5c34f-2066-0410-bec5-ba365beb4995
ADD: describe transformations also


git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@4818 42a5c34f-2066-0410-bec5-ba365beb4995