- module `process_slim_mapper` added. the module contains functions for
automated processing of SLIM mapper bitmap images as obtained from test rigs
by PCS Instruments.
- fixed a bug that lead to a `permission denied` error using the `import_del`
function (and related functions) if the imported file is in the current working
directory and the function is called within a program that runs in an IDE.
- docs theme changed to guzzle sphinx due to unresolvable compile problem with
rtd