add shorthand function for obtaining Services

C. Fahner <info@fahnerit.com>
add ignore phpdoc line

C. Fahner <info@fahnerit.com>
update phpdoc to include private functions
improve documentation a little

C. Fahner <info@fahnerit.com>
add phpdoc ignore line

C. Fahner <info@fahnerit.com>
fix Exception thrown in grantPermission when permission already granted

C. Fahner <info@fahnerit.com>