Add join() to the RDD class.
Update documentation for join().
Pre-allocate list with fixed length. Add test case for join() using string key.
Merge pull request #105 from sun-rui/join

Add join() to the RDD class.
Adds function foreach() and foreachPartition().
add Rd file for foreach and foreachPartition.
Add leftOuterJoin() and rightOuterJoin() to the RDD class.
fix review comments.
Merge pull request #111 from hlin09/hlin09

Adds function foreach() and foreachPartition(). It might help benchmark functions.
[SPARKR-130] Add persist(storageLevel) API to RDD.
Update comment to add a reference to storage levels.
Fix per the review comments.
Merge pull request #115 from sun-rui/SPARKR-130

[SPARKR-130] Add persist(storageLevel) API to RDD.
Merge pull request #112 from sun-rui/outer_join

Add leftOuterJoin() and rightOuterJoin() to the RDD class.
Adding the script to install software on the Cloudera Quick Start VM.