- changed back to using no optimization for UML modules, and no -g2

- changed back to using no optimization for UML modules, and no -g2
- set inode operations in object create
- s/WRITE/OBD_BRW_WRITE/ where applicable
- added much of the infrastructure for page reads/writes
- update inode->i_size on the MDS if extending the file
- removed extra mntget() which hung the loop device
- misc bugfixes
- changed notify_change to i_op->setattr; otherwise we get the mtime and ctime
  from the mds
- set reply lengths (or your replies get dropped!)