Update FindACE.cmake

Added ACE paths for OS X (MacPorts edition)
Merge pull request #5 from ldilley/master

cmake ACE path fix for OS X, 
nem: I sincerly hope i'll manage not to brake things :)
Merge pull request #6 from nemerle/63d3bfb9ad2954671d729f01e99cb758deb6bb90

Missing return fix in Example01's main.cpp
Merge branch 'master' of git://github.com/Segs/Segs
Preparatory work on using naked_ace from 3rd_party dir.