codechecker review first part
second part of codechecker review
update to new events system
Merge pull request #11 from danielneis/codechecker-review

Codechecker review
Merge pull request #12 from danielneis/events-update

update to new events system
Change admin to manager in db/access.php
Change $module to $plugin in version.php

$module has been replaced and it will not be supported in Moodle 3.0