Send issued certificates to teacher's email too #130

[lachlan-00]

I think i've done this correctly, please let me know if i've missed anything. (This is my first moodle plugin edit.)

This pull request should close this bug/request
Send issued certificates to teacher's email too #130

It will:

• Allow the pdf certificate that is sent to students to be sent to class teachers as well.
• It has an option to turn it on or off in the plugin settings.
• It has install and upgrade check in the script
• strings are separated from the student email strings and will only run when enabled by the plugin.

Please check my code out and make any changes you would like.

I think it might be a good idea to only set $tchsubject and $tchmessage inside the ($this->get_instance()->cert2teacher == 1) section but i only realised this when i'd finished typing...

[rlcharles]

@bozoh Are you accepting pull requests for this block ?

[bozoh]

The implementation is ok, but incomplete, i think.
That why:

• Must put cert2teacher as an option in certificate creation/edit form, so it's can be configured per certificate instance, not global for all certificates.
• settings.php will only define the default value in creation form, and i think the default value should be disabled