- Disables warnings for no-braced-scalar-init which shows up for ATOMIC_VAR_INIT.
- Fixes compile warnings, mostly "moving a temporary objects prevents
copy elision" (-Wpessimizing-move) and unused variables.
- Adds some necessary fields to make the sample compile after having
build the core library.
1) Added active time calculation (this is duration excluding context switch time).
2) Columns "Duration", "Self Dur.", "Self %", "% / Frame", "Active time", "Active %" in Plain mode shows total values per frame (sum of all values per frame).
Known issue: if context switch events occur out of profiled blocks then percent/thread may be calculated wrong as it is calculating relative to thread profiled time (which may be a very low value).
* (Core) Context switch events also register threads for current process;
* (Core) Writing process id into output file (old files still could be opened);
