etl

e1e3e7a1 - #475 When ETL_NO_ATOMICS is defined the timer.h file should not define timer_semaphore_t

#475 When ETL_NO_ATOMICS is defined the timer.h file should not define timer_semaphore_t #471 Add contains() method to etl::map and etl::set #477 deque::resize should throw deque_full if requested size is too large