* Fix warning C4244 in src/layer/normalize.cpp

C4244: '=': conversion from 'double' to 'float', possible loss of data

* Fix warning C4244 in src/layer/requantize.cpp

C4244: 'initializing': conversion from 'double' to 'int', possible loss of data

* Fix warning C4244 in src/mat_pixel_resize.cpp

C4244: '=': conversion from 'double' to 'int', possible loss of data

* Fix warning C4244 in src/mat_pixel.cpp

C4244: '=': conversion from 'int' to 'float', possible loss of data

* Fix warning C4267 in src/modelbin.cpp

C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data

* Fix warning C4244 in src/layer/batchnorm.cpp

C4244: 'initializing': conversion from 'double' to 'float',
    possible loss of data

* Fix warning C4244 in src/layer/padding.cpp

C4244: 'argument': conversion from 'const float' to 'T', possible loss of data

* Fix warning C4244 in src/layer/priorbox.cpp

C4244: '=': conversion from 'double' to 'float',
    possible loss of data
C4244: 'initializing': conversion from 'double' to 'float',
    possible loss of data

* Change DataReader::read()'s signature to fix warning C4267

This CL fixes lots of warning "C4267: 'initializing': conversion from
'size_t' to 'int'" in our codebase by matching DataReader::read()'s
signature to fread().

* Fix warnings C4244 and C4267 in tools/ncnnoptimize.cpp

C4244: 'initializing': conversion from 'double' to 'float',
    possible loss of data
C4267: 'initializing': conversion from 'size_t' to 'int',
    possible loss of data

* Fix warning C4244 in src\layer\selu.cpp

C4244: '=': conversion from 'double' to 'float', possible loss of data

* Fix warning C4244 in src\layer\cast.cpp

C4244: '=': conversion from 'double' to 'float', possible loss of data
C4244: 'return': conversion from 'float' to 'signed char', possible loss of data

* Fix warning C4244 in src\layer\psroipooling.cpp

C4244: 'initializing': conversion from 'double' to 'float',
    possible loss of data
C4244: 'initializing': conversion from 'double' to 'int',
    possible loss of data

* Update convolution_3x3_int8.h

* 针对winograd43 int8卷积的小改进

1. 使用非均匀量化系数，解决了权重转换溢出问题
2. 输出转换汇编优化

* Update convolution_3x3_int8.h

* Update convolution_3x3_int8.h

* Update convolution_3x3_int8.h

* arm-himix100-linux make error convolutiondepthwise_3x3_int8.h

* arm-hisim100-linux make error convolutiondepthwise_3x3_int8.h for asm

* convolutiondepthwise_3x3_int8.h f

* Fix min/max macro issue

* Make NOMINMAX public, since benchmark is build under CMake, it will no longer be bothered by min/max

* update

* Update mobilenetv3ssdlite.cpp

* Update mobilenetv3ssdlite.cpp

* Update mobilenetv3ssdlite.cpp

* web

* add disable pic option

* fix crop bugs

* fix crop_arm ang crop_vulkan bug about w_offset,_h_offset,c_offset