Add leftOuterJoin() and rightOuterJoin() to the RDD class.
Implement string hash code in C.
Add function cogroup().
Fix the review comments.
Fix per the review comments.
Refine code and add description.
Merge pull request #112 from sun-rui/outer_join

Add leftOuterJoin() and rightOuterJoin() to the RDD class.
Use extendible accumulators aggregate the cogroup values.
Merge remote-tracking branch 'upstream/master' into hlin09
Minor fix.
Adding the script to install software on the Cloudera Quick Start VM.
Add keyBy() to the RDD class.
Merge pull request #117 from sun-rui/keyBy

Add keyBy() to the RDD class.
Merge pull request #116 from dputler/master

Adding the script to install software on the Cloudera Quick Start VM to go along with the wiki entry.
fix reviews
Merge pull request #114 from hlin09/hlin09

Add function cogroup().
Fix build on Windows.
Merge pull request #113 from sun-rui/stringHashCodeInC

Implement string hash code in C.