Don't ignore spark.cores.max when using Mesos Coarse mode
Fixed a scaladoc typo in HadoopRDD.scala
Fixed typos in the CDH4 distributions version codes.
Merge pull request #171 from RIA-pierre-borckmans/master

Fixed typos in the CDH4 distributions version codes.

Nothing important, but annoying when doing a copy/paste...
Merge pull request #170 from liancheng/hadooprdd-doc-typo

Fixed a scaladoc typo in HadoopRDD.scala
Merge pull request #169 from kayousterhout/mesos_fix

Don't ignore spark.cores.max when using Mesos Coarse mode

totalCoresAcquired is decremented but never incremented, causing Spark to effectively ignore spark.cores.max in coarse grained Mesos mode.