Merge pull request davecheney#8 from jmhodges/adjust_readme

include just the graphpkg in the README

Author: davecheney

README.md

@@ -8,10 +8,10 @@ First install [graphviz](http://graphviz.org/Download.php) for your OS, then
 
 To graph the dependencies of the net package:
 
-	x-www-browser $(graphpkg net)
+	graphpkg net
 
 # Filtering
 
 graphpkg can also filter out packages that do not match the supplied regex, this may improve the readability of some graphs by excluding the std library:
 
-	x-www-browser $(graphpkg -match 'launchpad.net' launchpad.net/goamz/s3)
+	graphpkg -match 'launchpad.net' launchpad.net/goamz/s3