several possible bugs

[BetaGem]

Hi, I've encountered several possible bug in the image processing code. Here's a list of them:

in image_process.py, line 197, 211, 377, 390, 436, 449
The "hdu.header.update()" seems not to update the WCS correctly. I fixed it by replacing the "hdu.writeto(...)" with "fits.writeto(name_out, cutout.data, cutout.wcs.to_header(), overwrite=True)"

in image_process.py, line 107:
get_img_pixsizes() will fail if the "dir_images" parameter is provided.

in image_utils.py, line 906:
Add .astype(int) to np.zeros() or use np.full(..., 0). The "mask_region1" can't be a float array.

in image_utils.py, line 907:
"or" should be replaced with "|" or "np.logical_or()".

[yun201720]

The singleSEDfit founction is no longer usable.

[aabdurrouf]

Thank you very much @BetaGem for the very helpful corrections!