new filesystem interface.
* Renamed sISO* to gISO* though as they are in fact not static.
Briefly tested and works as expected. Thanks for your work Dustin!
Closes enhancement #2089.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24994 a95241bf-73f2-0310-859d-f6bbb57e9c96