Changed version number to v0.1.7
Mod: Changed kernel filesystem dir from /kernel/fs to /usr/kernel/fs
Mod: Bring iumfs_putapage call pvn_write_kluster with 6th argument to 32K.
This allows pvn_write_kluster to collect up to 8 pages.
And bring iumf_write call segmap_release without flag, this allows it
to disable write back. so that putpage is not called in this context.