The patch adds the apidoc target and the epydoc config file for it. Note
that this is for epydoc 3.0 and that it will put the docs into
./doc/api/.

The patch also adds a new .gitignore rule for the auto-generated rapi
fragment.

Reviewed-by: imsnah

Reviwed-by: imsnah

This makes it easier to setup new git repositories, and makes it more
likely all people have the same ignore rules.

Reviewed-by: imsnah