Add Shark+Bagel implementation
Update hadoop-env.sh
Update spark-env.sh
add sanppy control parameter
modified a minor syntax errror in dropping the table
disable sbt-avro
Merge branch 'shark+bagel' of https://github.com/bigframeteam/BigFrame into shark+bagel
Update spark-env.sh
Making scala version configurable
Making SharkContext singleton
first commit for impala workflow
Query made consistent with Hive query
first commit for impala workflow
Merge remote

Merge branch 'impala' of https://github.com/bigframeteam/BigFrame into impala
fix dependency conflict for impala and shark
modify copy file scripts
better qgen script