Ignore LaTeX files for now

Later the LaTeX (example) file will be placed in a seperate
directory.
Add an example file that will be parsed later
Add a LaTeX template for notes
Add a first command line parser of Markdown notes

This first version parses a Markdown file using
Kramdown. The template used is a custom LaTeX note.
All is quite minimal; lots of work to do, yeah.
Use serif font for PDFs