1) Added macro EASY_CONST_NAME(name) to make possible to force EasyProfiler think that given block name is const and not changed during application execution (this rely to compile-time strings saved into a run-time variable);
2) Starting from now, EasyProfiler will not store partially finished frames - first, this means that profiler enabled during frame execution will skip all blocks from this frame, and second, this means that when dumping profiled information profiler will wait until all frames finish before dumping blocks.
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);
