Move up Hadoop in pom.xml and add back protobufs
As Hadoop 1.0.4 doesn't use protobufs, we can't exclude
protobufs from Spark always. This change tries to order the dependencies
so that the shader first picks up Hadoop's protobufs over Mesos.
Merge pull request #48 from shivaram/master

Move up Hadoop in pom.xml and add back protobufs
tentative fix for amplab-extras/SparkR-pkg#53
delayed loading to have all namespaces available.
better fix for amplab-extras/SparkR-pkg#53

Merge branch 'namespace-fix'

Conflicts:
	pkg/inst/worker/worker.R
Minor: update a URL in README.
Fix that collect(parallelize(sc,1:72,15)) drops elements.
Merge pull request #65 from concretevitamin/parallelize-fix

Fix that collect(parallelize(sc,1:72,15)) drops elements.
Merge pull request #55 from RevolutionAnalytics/master

delay object loading to avoid namespace issues
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
merge
Merge branch 'master' of github.com:linearregression/SparkR-pkg

Conflicts:
	pkg/src/pom.xml