Improve converter:
Improve converter:

* Allow interactive conversion and reading from stdin
* Allow specifying an output file name
* Profiled conversion process and sped up some time-critical sections
* Run through pylint and fix or disable warnings as appropriate
* Add type hints for mypy

ChristianSi/lytspel,ChristianSi/lytspel,ChristianSi/lytspel,ChristianSi/phoneng,ChristianSi/lytspel