Tags: dhood/rcl

Make timer callback optional and fix timer logic

Make timer callback optional and fix wait bugs

Make timer callback optional and fix timer logic

Make timer callback optional and fix wait bugs

Merge pull request ros2#24 from ros2/opensplice_node_test

Fix node test for opensplice on Windows

Merge pull request ros2#5 from ros2/rcl_refactor

refactor rcl into a functional library

add explicit build type

add explicit build type