update readme

README.md

 
 The repository contains the data collection software and collected dataset described in [1].
 
-Data collection software: <br />
+Data collection software (extractor): <br />
 The data collection software is written in Python.
 The detailed information can be found in Guidelines of RunBatch.pdf
 
-Dataset: <br />
+Dataset (output): <br />
 The dataset is formed of several CSV files with extracted timings of IEC-104 [2] spontaneous events.
 The files are named in their flow that is defined as a three tuple (RTU, TID, IOA).