#7 : add gauge metrics to know the current diectory being read
update readPath time metrics and last waiting time for the new file/dir
add assert statements fro testing new metrics
remove commented code
add new metrics and fix review comments
update documentation and fix tests
refactor method names and update the pathBeingRead metrics in case of having all emptry dirs in the start of stream
fix documentation
refactor metrics and fix review coments
add metric in test and refactor tests
Merge pull request #11 from rajubairishetti/Issue-7

 add gauge metrics to know the current diectory being read