update .gitignore

.gitignore

-*.aux
-*.bbl
-*.blg
-*.dvi
-*.idx
-*.ilg
-*.ind
-*.log
-*.synctex.gz
-*.toc
-*.log
-*.tmp
-*pdf
-*swp
-.no.md
-*.acn
-*.acr
-*.alg
-*glg
-*glo
-*gls
-*.glsdefs
-*.ist
-*ist
-*.maf
-svg-inkscape
-*.out
-*.ptc
-old
+rubbish
 *.png
 *.jpeg
-*.tiff
-*.xcf
-*.xmpi
-*.slg
-*.slo
-*.sls
-.switch-*
+*pdf
 images/wide.jpg
-*latexmk
-*.fls
+svg-inkscape/