Drupal 7 version (for Moodle 1.9)

Here's a Drupal 7 version of this module. I mainly ran the code through Coder. The only additional larger change was changing

$content = theme('moodle_courselist', $links);
to
$content = theme_moodle_courselist($links);

Incorporated are also the changes suggested at
* #1044972: Prefix is '' in my database and
* #626304: Encoding problem with foreign language Moodle course titles

Next thing will be to tackle #1358504: Work for moodle 2.0.

EDIT:
The table names in Moodle 2.0 seem to be unchanged. The module does also work with Moodle 2.0.