Debug shim for the GlusterFileSystem.  Just replace GlusterFileSystem with GlusterDebugFileSystem in the core-site.xml, and every call to GlusterFileSystem will be logged in /tmp/glusterfs-X.log.  See source for details
Show a stacktrace for every method call.
Merge pull request #33 from gluster/GlusterDebugFileSystem

Debug shim for the GlusterFileSystem.