Update README for new features

Author: wert007

README.md

@@ -3,4 +3,10 @@
 This is a simple tool, which takes the output of `git log
 --output=outputfile.txt` and analyzes how much time somebody worked on it. E.g.
 simply call `commit-analyzer outputfile.txt --author-equals "wert007"` to see
-all commits, that fit the criteria and how much time there was put in it.
+all commits, that fit the criteria and how much time there was put in it.
+
+You can also use the output of `git log --numstat --output=outputfile.txt` and
+if you specify an output parameter in commit analyzer (e.g. `commit-analyzer
+outputfile.txt --output "commits-and-loc-by-date.csv"`) it will generate an csv
+with the date, the number of commits made on that day and the loc changes that
+have been made.