Add `timer_wrapper` functionality
Fix possible stack corruption
Add unit tests for timer
Add comments to `timer_test` and `timer_handler`
Working progress timer
Fixed `timer_wrapper` and `timer_handler`
First unit tests were added, more to come.
Merge branch 'topic/timer' into develop

Conflicts:
	se2p_2_3/common.mk
	se2p_2_3/src/lib/util/singleton_mgr.cpp
	se2p_2_3/src/lib/util/singleton_mgr.hpp
	se2p_2_3/src/main.cpp
Remove define from project settings...
This should be done in `config.h`
Add conveyor defines in `config.h`
Remove state transition output in `dispatcher_test`