use Deque instead of Stack (synchronized methods.)
Remove unnecessary toString in Timestamps.
Merge remote-tracking branch 'upstream/develop' into develop
Merge pull request #48 from croudet/develop

use Deque instead of Stack in SQLText (avoid synchronized methods.) …  Remove unnecessary toString in Timestamps.
Remove unused code
Verify getDatabase() != null
Revert changes to SQLText… because the break everything!
Merge branch 'connection_debug' of https://github.com/jesperpedersen/pgjdbc-ng into jesperpedersen-connection_debug
Change jdbc:postgresql to jdbc:pgsql