* added half_toward_zero; all previous tests passing

* all rounding modes added with unit tests

* fix cpu emitter

* round mode doc

* round out round modes

* doc typo

* using  names for round modes

* use ceil/floor for rounding functions instead of round/nearbyint

* clean up doc

* equidistant

* fixing some quantize and dequantize doc issues

* Update doc/sphinx/source/ops/dequantize.rst

* Update doc/sphinx/source/ops/dequantize.rst

* Update doc/sphinx/source/ops/dequantize.rst

* Update doc/sphinx/source/ops/quantize.rst

* Update doc/sphinx/source/ops/quantize.rst

* Update doc/sphinx/source/ops/quantize.rst

* change output to hypertext

* style check

* add stub files for quant dequant

* quantize / dequantize doc

* Small doxygen fixes

* Update quantize.rst

* quant docs