controller tests and class
add test for 1 arg
add test for move and left classes
add move and left turn implementation, tests ready for the rest
add move place report and right with controller tests
add help command
robot_simulator now just stdin processing controller took over
typo
check on regexp before registering would have helped with debugging typos
DRY refactor regexps into a constant allowing removal of move subclass extending initialize
remove missed unused accessors