Jncep

Correction for series with gaps in the partNumber (as returned by the JNC API)

- New format for tracked.json (compat kept with old version)
- List tracked series
- Added styling for classes centerp and noindent

The tool now uses commands. The previous functionality is in "epub" command.

Commands "track" and "update" have been added.

Fixed title + file name when generating multiple volumes

First public release