one instance, if two or more threads accessed a method at the same time.

  - if moving a file from a group, need to remove the entire group
  - Special test for when dest is a non-existent directory

dirname. Make it abs

called() to get the function.

transformations

simplified a little bit of code in getFileGroup

word in python 3.7

doc tweaks.

was always returning unknown. Also adjusted wx properties so they can be
queried if a gui is not open, but is available.

method.

different shapes

everywhere.

it accepts numpy arrays