One too many mornings

Revamped the build system for scapa. It now builds two projects.

• Hops: The firmware for the emma2 based dual tuner module
• Barley: The firmware for the au1550 based motherboard

There is a one touch build process that builds hops, copies the resulting firmware file into barley ramdisk, and builds barley. Extra features to be added are; compressed kernels for both firmwares and optional building of yamon.