Trace detail tree-table control.
Per-trace runtime attributes (eg. min logged trace time).
Refactor of trace building/marking classes.
Refactor of trace building/marking classes (part 2).
Maintain trace markers stack (in addition to trace records stack).
Per-trace minimum execution time setting + accompanying spy function.
Skip adding new tracer records if no marker is set.
Limit number of records in one trace.
Add flags in trace markers, mark overflow flag if records are dropped.
Add flags in trace markers, mark overflow flag if records are dropped (broken, needs to be reimplemented).
Overflow control and marking algorithm - proper implementation.
Merge pull request #71 from jitlogic/rel08c

Tracer improvements.