[sudo-access] new form for omni key card requests

[Yardena Cohen]

I'm sick of reminding people exactly how to request key cards. From
now on let's just send people to this URL:
https://omnicommons.org/keys/

It won't (and probably shouldn't) automatically add someone's card to
the door computer. But it will send a formatted email to the keys
list, which already exists for this purpose:
https://omnicommons.org/lists/listinfo/keys

The code is at /home/occupy/public_html/keys/index.php. It could use
lots of love, such as:

* somebody with front end skills to give it nice CSS
* A writer to give it a nice intro text
* A coder to make it better/safer/more automated