cracker on mesos

Update CCUtil.scala

fixed issue with pair RDD

update to a more recent version of Spark

resetting checkpoint dir

if configuration variable printAll is true cracker prints all the CC

readme update

Merge branch 'optimizations' of https://github.com/hpclab/cracker

fixed issue #1

added SGC algorithm

added license file

added license file

added optimizations and alternating algorithm

update readme

removed path