Force fontconfig configuration on Mac OSX

Somewhere along the line fontconfig stopped looking in the current directory for the "fonts" directory that was packaged with PMS on Mac OSX. Also, Apple stopped shipping X11 by default which changed the font directories. As a result of both, fontconfig could no longer find any fonts on Mac OSX.
Flag TODO for later

From https://github.com/ps3mediaserver/ps3mediaserver/commit/5e9a3e626b8bbbb21e79b515fb546b330ac02b30
Correct constructor

From https://github.com/ps3mediaserver/ps3mediaserver/commit/2f574f73d843fade0dc9b830752acbdf52e85532
Merge pull request #46 from UniversalMediaServer/PMS

PMS