added mbed xcompile toolchain to arch-setup
Merge branch 'master' into mbed
added mbed toolchain to required ubuntu packages
began work on toolchain setup for MBED
Merge branch 'master' into mbed
bed datasheets & schematic added
moved automoc_on to specific build files rather than having it in global ctxt
setup MBED build system.  closes #139

The new MBED-based firmware is in firmware/robot2015/cpu

Running `make robot2015` from the project root builds the C files in that directory
into an executable placed in run/robot2015.bin
Merge branch 'mbed'