Fixes a problem with non-squared images containing nan values as a padding that matplotlib does not like when creating an image

Fixes a problem on image generated with mathplotlib : pixel representation was not 1:1 with provided pixel array

manually adding a new line in the table and coordinates rounding inconsistencies

Lines can be added manually, this parts still requires testing

This reverts commit f34427d5.

We inversed an array instead of its copy so there was a mismatch in data afterwards

This reverts commit bb2205d5, reversing
changes made to ad841690.

Displays click marker only when there is a value, click was not on the menu and no interaction is enabled

added a route /static/fits to download the fits files. The path to provide is relative to FITSFilePrefix ( env var YAFITS_FITSDIR)