note about bug in "mcount" parameter
add todo
Rewrite of write_stitching_macro()

- use proper padding
- disable computation of positions if overlap below 5 percent
- ask user for input directory if not given
- print some useful information while running
- macro coding style cleanup
- print generated code to log in debug level
add TODO
add doctest using input from the sample_data repository
code example how to call a macro from Python code
some playground code to run the stitcher directly from Python

** NOT WORKING (YET)! **
more py-stitcher testing
some fiddling with the script editor from Python
PEP8 compliant indenting
minor cosmetic layout change
separate generator code from file writing
compact generator code a bit