Properly quote the database name when deleting deprecated entries.

Subroutine added to optionally wrap values into arrays. Checks to see if the value is already an array and if so returns it untouched.

Updates for execute_into_hash() which now allows you to process a query which could return the same key multiple times and can support parameters being passed into the statement prepare() method.

Added ensembl_object_type and ensembl_id methods so that IF the dbentry is connected to a specific Ensembl entity (Gene/Transcript/Translation) then we can easily find out which one it is

Asking for a a GOTerm adaptor, or a SOTerm adaptor, still works, but the
correct call to get_adaptor() should request an OntologyTerm adaptor.

  the array objects instead of dereferencing using integer indexes from
  for-loops, and use [-1] instead of [$#$ea].

the form "host:port", with ":port" being optional (default is 3306).

fixing problem reported by Mark McDowall.