Fix quantizer for UInt8 type (#418)

Merge pull request #439 from microsoft/fix_testcases

fix Windows compiling for interlockedcompareexchange

optimize the reconstruct vector allocation

fix BKT clustering atomic_float_add issue

remove OPQ training dependance

fix BKT reconstruct crashes

add some fixes to dynamic cases

fix SPFresh Dynamic Quantize vector

test quantization in SPFresh (#440)

Fix labelset compiling issue

merge changes in internal version

fix dataset

Add split VID check

avoid dataset incblock leak