[broken]Move code Moved files without any changes to easily track later changes.
Simulation setup improvements: * Use cocotb-path to get cocotb install dir * Use relative paths to find source code for simulation * Remove rm dual_serial test * Ignore build directory
Import the JTAG interface code as used for the Chips4Maker pilot Retro-uC This code has currently been tested in FPGA through a buspirate so should already be functional.