Trivial Description
Current quick start guide has minor typos reported by users:
(1) The "</description> " delimiter in the hdfs-site.xml configuration needs to be removed.
(2) The "-of" option (valid for Giraph 1.0) in the SimpleShortestPathsComputation example command needs to be replaced with "-vof" (reported by GIRAPH-774) if using trunk. Also, for trunk, update the output of "GiraphRunner -h" to the latest description.
IMPORTANT: Make sure to specify v1.0 vs. trunk differences (e.g., point 2 above). We need the docs to support both v1.0 and trunk.
