timing class

create a class to measure time duration

changed milestone to %Experiment Setup

mentioned in commit e936d100

/esimate 1h

added 47m of time spent at 2019-11-14

mentioned in issue #11 (closed)

mentioned in merge request !11 (merged)

closed via commit e936d100

mentioned in commit 3b54d872

closed via merge request !12 (merged)