HLL sketch UDAFs and UDFs

• added DataToSketchUDAF, UnionSketchUDAF, SketchToEstimateUDF and UnionSketchUDF for HLL sketch

Align with core 0.10.0

• This is based on sketches-core-0.10.0 and memory-0.10.1
• Tuple Sketch: added ArrayOfDoublesSketchToValuesUDTF to dump values

Align with core 0.8.2

• Fixed Memory shading problem. The shaded hive jar now includes both the shaded core and shaded memory code.
• Added TupleSketch UDFs

Align with core 0.7.0

• Added frequent items sketch UDFs
• Added parameter K to quantiles sketch union UDAFs
• Added UDFs to get K from quantiles sketches
• Heavy refactoring of theta sketch UDFs, added seed support, changed the default number of nominal entries to be consistent with core library, fixed treatment of empty sketches in union
• Added UDFs to get PMF from quantiles sketches
• Code style and documentation improvements

Align with core 0.6.0

Major Additions

Doubles Quantiles Sketch

Generic Quantiles Sketch with additional String implementation

Fixes

• In DataToSketchUDAF, it was restricted to only Writable types, now allows any input types.

Other

• Minor performance improvements.
• Javadoc improvements

Align with core 0.3.0

• Update Set Operations

Align with core 0.2.2

• Updated Set Operations for Hive

Open Source

Initial Open Source Release aligned with sketches-core 0.2.0