#4 SecureLock doesn't really allow using shared database

[Jyri-Petteri Paloposki]

The software has some problems with using a database
which it's not allowed to create itself. It wouldn't be
too difficult to make it more friendly to shared
databases - an configurable table prefix would be of
some use also.

If it's not going to be changed to support shared
database decently, please do at least add some better
message to securelock_admin.php, when it detects that
the database does exists but gives SQL-errors when
trying to SELECT something from the tables. Some
existence check for the tables would be nice...