letsencrypt app

[shaylami]

I have gotten the front end sorted out with showing a user's installed certs and available domains.

Now that is sorted out the real fun begins!

ToDo:

1. check if lets encrypt is installed on the server and install it if not. (install.run) - let me work on it
   
2. create system cron job to auto renew all domains if any installed. (install.run)
   
3. create certificate for user domain. (controller.ext.php)
   
4. remove certificate for user domain. (controller.ext.php)
   
5. remove cron job if module removed (remove.run)
   
6. remove lets encrypt if module removed?? (remove.run)