* Fix buggy if-conditions in transition functions.
* Bugfix: incease number of states by one
* Cleanup CMakeLists.txt and package.xml
* Move goal state machine implementation details from header to C file
* Create rcl_action package with proposed headers for:
- Action client
- Action server
- Goal handle
- Goal state machine
- Types
* Add rcl_action.h and Doxyfile
* Add functions for adding action clients and action servers to a wait set
* Add default QoS profile for status topic and document default options for action clients/servers
* Include all headers in a .c file for testing compilation