Support for linking with additional .cls and .sty files 

Sometimes you have a complex TeX template that links with external .sty and .cls files.
With this merge, user can place such files in his app root and list them in config:
LatexToPdf.config[:supporting] = %w(res.cls helvetica.sty)
and rails-latex will copy them in the same directory of input.tex
Here is an example:
https://github.com/hammady/myresume