Merge pull request #22 from hajee/master

Added support for RAC
Merge pull request #23 from hajee/master

Small fix for rac aware database
Update for Oracle RAC
Merge pull request #24 from hajee/master

when a scan adress is not defined in the DNS, it fails, buut we can cont...
Merge pull request #25 from hajee/master

Small fix for RAC
dbca 11g template fix
OPatch fix
push a new version
Small syntax fixes picked up by rake syntax