Lightcurver

Post-JOSS review release

- Absolute photometric calibration with Pan-STARRS in addition to Gaia
- added a simple script interface:
`lc_init` to quickly setup a working directory
and
`lc_run /path/to/config`
to run the pipeline.
- various bug fixes

Added support for position dependent distortion of the PSF. The pipeline now tracks the positions of all extracted cutouts in all frames, as uses this information to fit a position-dependent affine transformation (shear + stretch) of the PSF models.
Will break with older reductions, need to re-extract the regions file.

Bug making one ROI cutouts per frame per existing PSF fixed. Now one ROI cutout per frame, even if multiple PSFs (selects lowest chi2 psf that is within acceptable bounds).

Just switched to Vizier as main Gaia provider because the Gaia archive was down.

Minor release for pypi