Added a README on how to run the code

Assignment-2/README

@@ -0,0 +1,14 @@
+In order to run the code, use a terminal to navigate into the src-directory 
+and type the following command 
+$ python main.py [dcr-graph] [log]
+
+replace [dcr-graph] with the location of the dcr-graph in .xml-format, and
+[log] with the location of the log in .csv
+
+For example if one wanted to run the test with the Dreyers-log and our full
+DCR-graph use the command
+$ python main.py data/DCR-full.xml data/log.csv
+
+If you are missing any of the external modules used in our implementation
+use the below command to get them
+$ pip install [module_name]