updated readme

Author: holderlb

README.md

@@ -8,8 +8,12 @@ Support: This material is based upon work supported by the National Science Foun
 
 ## Running
 
+To run GSG and generate output files:
+
 ```python3 gsg.py <inputFile.json>```
 
+To convert GSG output graphs to GraphML:
+
 ```python3 gExportGraphML.py <graphFile.json>```
 
 ## Input File