Processing feedback of production version deployment on 23 August: 

1) Corrected report auto-refresh mechanism. 

ProgressLogReader.java: 
Added condition to infer changes to the log file. Added fields
currentLastLine and savedLastLine. 
pushPipelineStatus() now detects changes to the log file and invokes
Main.notifyProgressLogFileChanged(..) in case of change. 

Main.java:
Updated notifyProgressLogFileChanged(..) method. 
Added NO_NEW_REPORTS_MESSAGE. 
Removed NO_REPORTS_MESSAGE.