iro eto prepare

- mount with options
- rio submodules
- everything as git submodule
- update
- adds iro to rio install
- gentoo installer
- gentoo installer
- r8168 driver
- r8168 driver
- gentoo mirror
- almost there, grub pxe working
- r8168 driver
- more grub pxe. DHCP failing...
- more grub pxe. udhcpc simple.script
- pxe boot OK RIO-59