Oh, if apples use different extension for shared object, have a look
Omega.cpp:193, where we check what files are plugins. It will
compile just fine, but will not load any plugins at startup. You can
therefore put some other checks there, the point is to not fix in
advance where we have plugins, but just scan and load everything.
Beware that python modules also engi with .so, but don't start with
lib (at Linux at least, I have no idea how python is compiled at macs)
Let me know if there are some problems.
