new logic for determining when to take a full backup
only hold onto backups for 14 days (not 31) and show when the backups will be deleted in the control panel
tweak backup explanatory text
show the response from spamhaus.org in the status checks output
don't automatically create an alias if a user account already exists by that name

In the event the first user is an address that we'd normally create as an alias,
we'd generate a loop from the alias to the administrative alias to the first user
account (which was the alias again).

hopefully fixes #186
update roundcube version
Merge pull request #188 from Bretos/master

update roundcube version
Changed incomming-email-input to type text

The input type="email" validation won't allow "@example.com", which is needed for catch-all-aliases.
Merge pull request #192 from ch000/patch-1

Changed incomming-email-input to type text