Use a better list append in shuffles
This is helpful in scenarios where we have a large number
of values in a bucket
Address code review comments
Merge pull request #67 from shivaram/improve-shuffle

Use a better list append in shuffles
Delete temporary files after they are read
This change deletes temporary files used for communication
between Rscript and the JVM once they have been completely read.
Fix up comment
Add return type to hasNext
Merge pull request #68 from shivaram/master

Delete temporary files after they are used
Makefile: factor out SPARKR_VERSION to reduce potential copy&paste error; cp & rm called with -f in build/clean phase; .gitignore includes checkpoints and unit test log generated by run-tests.sh
Update Makefile (style uniformity)

Add a space for style uniformiity
Merge pull request #72 from edwardt/master

(minor improvement) Use variable for SparkR assembly versioning in Makefile; ignore folders and files generated in unit tests to avoid accidental checkins
add links to devtools and install_github
Merge branch 'master' of https://github.com/edwardt/SparkR-pkg
Update README.md
Update Makefile (style uniformity)

Add a space for style uniformiity
Update README.md
Add where to enter bugs ad feeback
don't check in gedit buffer file'
Update README.md

rewording and remove some unnecessary sentence
Update README.md

further rewording per comment feedback
Update README.md

Add blank lines for better seperations