Merged in cm0 support and updated build system

CMakeLists.txt

Dockerfile

aes/CMakeLists.txt

aes/TI_aes_128_encr_only.c

aes/TI_aes_128_encr_only.h

aes/debug.gdb

aes/generate-reference-output.c

aes/lipsum.h

aes/main.c

aes128/CMakeLists.txt

aes128/main.c

blink/CMakeLists.txt

blink/blink.c

cmake/cm0-toolchain.cmake

cmake/common.cmake

cmake/msp430-toolchain.cmake

cmake/tail.cmake

cmsis/cmsis_armcc.h

cmsis/cmsis_armclang.h

cmsis/cmsis_armclang_ltm.h