Added parse.awk to repository
Reformat and slightly enhance parse.awk; add TODO

I did some formatting and restructuring to the parse.awk script so that
we can edit/extend it more conveniently later.

I also removed some sanity checks to this end because hey, if you don't
get the docs format right, you better don't dare writing functions >:-)

As for the TODO: one of the rare occasions, I commit (partly) German
documents but most of the items are directly taken from an email and
I see no need to translate them, as I hope they're cleared soon.

For reference, I wrote a get_define.3 manpage by hand to show how it shall
look like. This will go as soon as we reach that standard.
parse.awk: Do most of the TODOs

The TODOs are almost emptied. Some small things and one bigger item remain.
I also removed the model get_define.3 because that level is reached, now.
Finish extract-docs

The script now does everything I currently (and there is not much more to do
in the future) want it to. Closing the branch.
Merge branch 'extract-docs-fixes'