Added back SGE functionality.

TODO: Eventually SGE functionality will be handled by WrapCmd.pm.
However, the hosts file for multihost is not implemented yet, and until
that happens WrapCmd.pm is not ready for prime time..
Bumped version to 0.3-TRIAL. Moving to two digit version numbers.

Unfortunately, three digit version numbering (i.e. "0.2.3") only works
with perl 5.10 or newer.  I would like to stay compatible with 5.8.1, so
the only easy fix is to move to two digit version
numbers (i.e. "0.3"). See also:
<http://www.dagolden.com/index.php/369/version-numbers-should-be-boring/>