Main changes in this large commit:

* New executable pyroman command that does pyroman1 to PDF conversion, though very limited
* New conversion module for pyroman1 to pyroman model, supports:
  * Title
  * Paragraph
  * Headings 1 to 7
  * Code (without captions and syntax highlighting)
* New preformatted parameter that preserves spaces, and line-breaks (for code)
* Came up with a possible file extension ".pyro"
Merge branch 'master' of git+ssh://github.com/eblade/pyroman2