Added ability to make links within a post

Added support for categories.

Added support for any file metadata via data_*.

Force 'selective if inherit is chosen.

Do not use inheritance by default in property matches

Added docs about blocks.

Added features and diff

Adding hook to export md file.

Adding ignore file

Adding index.md

Tried to follow some elisp conventions.

Adding elisp file.

Added convenience section for docs, and tangle on save.

Added date to license

Rearranged nodes

Uncomment

Control export of \newcommand directives with a variable.

It really slows export down. Did not attempt to speed it up.

Fix bug where posts that had a hash but no file did not have files created.

Ouch.

Remove duplicated function.

Added documentation for opel-write-all.