DRILL-9 - Move to something like maven standard layout
DRILL-9 - Rearrange into Maven form, small changes to get the code to compile
DRILL-9 - Added commons I/O to pom (should move to test scope).  Fixed a number of small problems.  Still needs a lot of work.
Initial work on logical plan parser and expressions
Update operator graph to be graph shaped.  Automatically get source and sink operators and confirm their location
Add license headers.  Updated operators to better match documentation, mostly immutable now.
Removed early distractions
Cleaned up parser tests.
DRILL-9 - JSON based plan syntax
DRILL-9 - Add jackson dependencies
Merge branch 'DRILL-9' into DRILL-3
Basic reference interpreter implementation
DRILL-21: demo improvements
reference implementation of limit operator
Vector logos
DRILL-33 - Synthetic Log Generator
DRILL-33 - Cleanups.  Added some doc, changed build to do jar-with-dependencies.
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JDBC driver, SQL parser, and planner that generates logical plan. Test very simple statement that returns a single column that is a map; returns 5 rows.