initial commit of ST_Aggr_Intersection
ST_Aggr_Union: utilize ListeningGeometryCursor, use spatial reference
   of the input geometries, fix null result when multipolygon or linestring.
Initial commit of ST_Aggr_ConvexHull - fixed-size batches
Minor refinements per code review
ST_Aggr_ConvexHull: Inner class name, Log null argument, Merge same as iterate
Merge branch 'master' into udafdev
ST_Geometry aggregate files moved to mavenized directory structure
ST_Geometry aggregate functions depend on geometry-api-java version 1.1.1
Merge pull request #32 from Esri/udafdev

ST_Geometry Aggregate Functions for Hive