LaTeX table fit results, debug full model FWHMs

Generate LaTeX tables of full model fit results.
Improve and fix model FWHM calculations, mainly bugs in finding peak
maxima + FWHM edges from intensity grid. When peak/FWHMs not found,
return error values gracefully. Remove old code in Python full model.
More precise model fit errors, code cleanup

Refine error estimates with root finder, search outside grid FWHMs.
Only run full model fits 1x at fixed `epsfcn`.
Add skeleton for model fitting code redesign.

Full model fitting code maintenance: prune obsolete code,
bug fix full model fits w/ `ind` kwarg,
remove old B0 interpolation code (in Tycho ipynb)
recompile FORTRAN (f2py) code only when Python model port loads
move LaTeX table formatting to new module.