Made a minor change to always create an 'ended.txt' for each job run
at its end. This file indicates that the job has completed running.
Text contains one of the following
1) Job succeeded
2) Job failed
3) Job crashed
Merge pull request #7 from NuGet/daravind/ChangesToJobRunnerAndLogger

Made a minor change to always create an 'ended.txt' for each job run at its end