gdmd wrapper updated and ported

[Anders F Björklund]

The gdmd wrapper script was ported over to Bash by
John 'Profic' Ustiuzhanin, with some new features:

http://www.dsource.org/projects/tango/forums/topic/142

I have ported the features over to the Perl version,
and will release both of them (under the GNU GPL).

http://www.algonet.se/~afb/d/dmd-script.patch


Hopefully it will be included in the next version of GDC,
along with the bug fixes and additions reported before:

http://d.puremagic.com/issues/show_bug.cgi?id=1136
http://d.puremagic.com/issues/show_bug.cgi?id=1137

--anders