Added libusb v1.0.8 as submodule
Added parted v3.1 as submodule
Adjust command line arguments

boot <spl> [<u-boot> [<fit> [<image>]]]

* Specify files to load on the command line
* Allow boot/flash process to stop after any stage
Merge branch 'master' of 192.168.7.2:beagleboot/