feat: quantize a whole graph/modules  (#1618)
feat: quantize a whole graph/modules  (#1618)

* feat: quantize a whole graph/modules

* feat: python supports

* fix: delete unusage

yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,yangw1234/BigDL,intel-analytics/BigDL,yangw1234/BigDL,yangw1234/BigDL