roles/nginx: Add a handler for reloading nginx and change all the roles to use it, instead of restarting nginx.

roles/archweb: Add a forced_deploy variable to trigger a deploy even when nothing seems to have changed. Also restart memcached on deploys.

roles/archweb: Added a register for virtualenv changes and to deploy archweb in this case. Also changed nginx template to use the main domain.

roles/archweb: Deploy archweb on config changes too. Also, add a check to add ssl_require mode when connecting to remote hosts.

roles/archweb: Create a pgp_import service and a pacman hook to run when archlinux-keyring is updated

roles/archweb: Memcached service.
roles/postgresql: Initial work on SSL support.

roles/archweb: Make archweb install and use it's own memcached service, running as the archweb user and using a socket.

roles/archweb: Nginx deployment, domain variable and other improvements.

I've had mode=755 create garbage already...

Signed-off-by: Florian Pritz <bluewind@xinu.at>