Add copyFromSafe to ValueVectors.  Correct directionality of variable length copyFrom.
DRILL-185: Extend code/clean code generator and add first aggregate functions.
DRILL-178 Creating JSON Storage engine
DRILL-190 (part1) First pass at join operator (includes work from JN).
DRILL-190 (part2)
 - MergeJoinBatch handles record batches
 - JoinStatus tracks state across input and output batches
 - MergeJoinBatchBuilder builds a selection vector of right-side batches which may be rescanned
 - implement code stubs for merge join
 - add field expression parsing and start of generated merge join code
 - code generator support for merge-join's copyLeft(), copyRight(), compare() and compareNextLeftKey()
 - add line prefixes to generated code log
 - support VectorContainers in declareVectorValueSetupAndMember()
 - fix vector allocation in MergeJoinBatch
 - fix missing values from left batch when right batch has been exhausted
 - fix nullable handling in generated merge join code.  make simple merge join test use multiple batches.
 - fixes for sv4 batch support, additional multi batch test
DRILL-190 (part3) Fixes for integration between JSON changes, updated CodeGenerator and merge join
DRILL-121 RPM and DEB packages
DRILL-187 move hadoop dependency to top level pom
DRILL-188 add profiles to build with hadoop artifacts from vendors: mapr, cloudera, hortonworks
DRILL-167, DRILL-80, DRILL-59 start
make changes to support sqlline module and ensure no test jars on class path
DRILL-191 ParquetGroupScan and AffinityCalculator do not properly handle directories or multiple files
fix hadoop dependency problem in ref
Limit width to 5x the number of endpoints
Tool for submitting physical or logical plan
fix jackson conflict for mapr build
DRILL-167, DRILL-80, DRILL-59 continued
fix parquet query join errors
Reorganize location of generated files to support other generated needs.  (Clean up packages for outputs and change directory structure for inputs and inputs.  Packages changes caused large set of changes to other files.)
Add code generated comparison and cast functions.
some comparison function fixes and updates to support ref engine sql testing