Perl syntax

Added simple Perl syntax to Jemdoc. May possibly be improved in the future, but covers the basics now. An example is given in the index.html file of my soerenbnoergaard_dk repository, or at www.soerenbnoergaard.dk.

Also, I edited the shebang line to python2 instead of python. On Arch Linux "python" is python3, and I figured it would work universally as "python2".

Thank for sharing Jemdoc -- it's quite a useful tool.