Use a .gitignore for auxiliary files

[martinjohndyer]

We don't need to (and shouldn't) include the auxilary files generated when building with LaTeX. I think only the .tex, .bib and any style files (.sty/.bst) are really needed.

Here the .gitignore file I used for my LaTeX repo:

# LaTeX files
thesis.pdf
*.acn
*.acr
*.alg
*.aux
*.bak
*.bbl
*.bcf
*.blg
*-blx.bib
*.glg
*.glo
*.gls*
*.ist
*.lof
*.log
*.lot
*.maf
*.mtc*
*.out
*.ptc
*.run.xml
*.synctex.gz
*.tdo
*.toc