Timing: add more convenience
Timing: add more convenience

Now it is sufficient to call the reset() method to reset the current
timing to 0, and you can call report(null) to make debugging easier
when the file name and line number are sufficient for the performance
benchmarking.

Signed-off-by: Johannes Schindelin <53fb8db7833fca1e1746dd8592f61048d350f64c@gmx.de>

scijava/scijava-common