tachyon related
tweak
Minor fixups.
Fix code examples per @jegonzal/@ankurdave meeting
adding graphx to module information
improving tutorial
more edits to tutorial
removing unused Graph
Fix spark.serializer bug and a few others
Merge pull request #127 from jegonzal/graphx-tutorial

Additional cleanups to GraphX tutorial
Merge branch 'ampcamp4' of github.com:amplab/training into ampcamp4
Merge pull request #125 from mengxr/ampcamp4

Add personalized movie recommendations to ampcamp4
fixing bugs
various fixes.
Merge branch 'ampcamp4' of github.com:amplab/training into ampcamp4
typo
update
more edits to later parts of second section
more edits
using pretty print for shell command