Add sample output from a capture of 11 days of GitHub traffic.

Update README.

README.md

@@ -3,6 +3,10 @@
 ## About
 Hadoop tool to import data from the GitHub public timeline XML format.
 
+Run with:
+
+    $ hadoop jar hubstats.jar hubstats.HubStats input output
+
 ## Output format
 The following fields are output:
 
@@ -16,3 +20,23 @@ The following fields are output:
  *  *tag* - The Git tag name
  *  *alternate_id* - An alternative numeric id if the event relates to an Issue, PullRequest or Gist
  *  *subtype* - Further subtype of the event, for example an Issues event can be 'Opened' or 'Closed'
+
+## Sample Output
+Sample output from a run over 30 gigs of the timeline requests (about 300,000 GitHub events in a bit over 11 days) is available in `sample-output.gz`.
+
+    $ gzcat sample-output.gz | awk '{print $3}' | sort | uniq -c | sort -nr
+    173260 Push
+    48186 Create
+    34782 Watch
+    12256 Gist
+    11756 Issues
+    9453 Follow
+    8731 Fork
+    8202 Gollum
+    6672 PullRequest
+    5132 Delete
+    4027 CommitComment
+    2527 Member
+    1666 Download
+    1053 ForkApply
+     288 Public