import scala converter to convert between java and scala collections
add new metric type
clean up comments
restore build.sbt version
Merge pull request #48 from kimyen/develop

Question: Correct vs Incorrect
take out time controller for file download report, report all download
history instead
add a button to file download report ui
fix the bug in file download report
use match case instead of if else
refactor code
Merge pull request #51 from kimyen/develop

File Download Report Changes