Changes:
- Add a typeahead, with fuzzy string search, on the Selected Gene text box
- Improve error handling and detection of ScanPy data containing NaN or Infinite values.
- Add `--nan-to-num` command line parameter to convert NaN/Infinite to finite floating point values.
- Minor improvements to startup speed
Breaking changes:
- Added `--host` command line option, replacing `--listen-all`. The equivalent of `--listen-all` can now be accomplished with `--host 0.0.0.0`