Added lots of example PDFs

Closes #[13](https://github.com/garysieling/pdf-js-csv/issues/13) and #17 

* Three screenplays: short _(Cemetery Club)_, full-length and numbered _(Argo)_, full-length and unnumbered _(It's a Wonderful Life)_
* Three schedules in different layouts, but all with the same data
* Example budget
* Example film Day Out of Days (a great document for testing parsing of tables)
* The example PDF used in Mozilla node.js, which is an academic paper _(compressed.tracemonkey-pldi-09.pdf)_