Acquire()/Release() support as well. New Directory base class. Added basic support for file systems and the root file system, not yet fully working (no path parsing yet), and not yet tested. Implemented fstat(). git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4591 a95241bf-73f2-0310-859d-f6bbb57e9c96