Cleanup makefile
Cosmetic
ignore pyc and profile files
No need for headers with hardcoded values. To get ARM working we just need to ifdef few of SYS_* statements.
improve makefile
docs: mention development and testing
hey! new argv_join, just for the fourth time
removed whitespace and spurious code
polishing tests
get nanosleep to work even with second parameter, 516 for poll is okay