Fix for reading 9+ chars string via Cloud
Merge branch 'master' of https://github.com/davids5/core-communication-lib into davids5-master
Change more millis values from int to long
Using type system_tick_t for callback_millis and interface to millis()
Merge branch 'sys_tick' of https://github.com/davids5/core-communication-lib into davids5-sys_tick

Conflicts:
	src/spark_protocol.cpp
	src/spark_protocol.h
	tests/ConstructorFixture.cpp
	tests/ConstructorFixture.h
fixed all timer type to use system_tick_t