Larch deconvolution backend

[0xDBFB7]

Hi Bruce Ravel,

Thanks for this great software! This is just a clone of the ConvoluteNoise.pm panel to expose larch's xas_deconvolve. I'm new to perl, so apologies for any faux pas.

This is a W.I.P.: I'm trying ( https://github.com/0xDBFB7/xraylarch ) to add a few more advanced deconvolution algorithms (Fister et al 2007 's Lucy-Richardson) to larch, and I'll update this PR if I get them working stably if that's okay with you.

TODO:

• [ ] Add Lucy-Richardson once it's in
• [ ] docs docs docs documentation
• [ ] cleanup
• [ ] add new files to manifests
• [ ] add menu options for xas_d's smoothing parameters

Thanks!