#4 Add support for Solaris

[Mark J. Olesen]

for common/test, you may want to add in Solaris
wrappers for alphasort & scandir, which can be found here
http://archives.seul.org/gdis/gdiscuss/Apr-2001/msg00002.html

pltestdecoders.cpp:71: error: `alphasort' undeclared
(first use this function)

pltestdecoders.cpp:71: error: `scandir' undeclared
(first use this function)