+) emulator/clock_extra --- buttons
+) include/common.h::Call() -- a macro
    Call(function) makes a function call taking PARAM_CHECKS macro into
    consideration.
    If the macro is defined, ContinueError(functionResult, "%d");
    will be called if function fails.
    If the macro is not defined, the result will be ignored

+) lib/clock_state.h -- clock state to pass with every iteration of main
loop

+) lib/clock_main -- working on clock_update(ClockState *) function
which will be called from main loop

*) lib/clock_time::clock_updateUptimeMillis() now takes a pointer to
unsigned long to get and set lastMillis