Merge pull request #52 from cornerot/patch-1

fix gosiger -> gosigar

README.rst

@@ -247,7 +247,7 @@ I have been influenced by the following great works:
 
 - psutil: http://pythonhosted.org/psutil/
 - dstat: https://github.com/dagwieers/dstat
-- gosiger: https://github.com/cloudfoundry/gosigar/
+- gosigar: https://github.com/cloudfoundry/gosigar/
 - goprocinfo: https://github.com/c9s/goprocinfo
 - go-ps: https://github.com/mitchellh/go-ps
 - ohai: https://github.com/opscode/ohai/