Changed Spark version back to 0.6.0.
Changed Spark version back to 0.6.0.

alabid/blinkdb,sjyk/sampleclean,sameeragarwal/blinkdb_dev,mattyb149/blinkdb,alabid/blinkdb,vax11780/shark,lzshlzsh/shark,sameeragarwal/blinkdb_dev,lzshlzsh/shark,sameeragarwal/blinkdb,mapr/shark,mattyb149/blinkdb,mapr/shark,amplab/shark,vax11780/shark,alabid/blinkdb,sjyk/sampleclean,amplab/shark,vax11780/shark,sameeragarwal/blinkdb_dev,sameeragarwal/blinkdb,sameeragarwal/blinkdb,mapr/shark,sjyk/sampleclean,amplab/shark,lzshlzsh/shark,mattyb149/blinkdb