* fix gemm_int8, gemv-int8 and conv-int8 math function, add float bias

* change conv impl

* neon int8 kernel support float bias

* arm compute kernel support float bias

* add math_test target

* add tensor utils for testing, fix sgemm ut error

* add gemm_int8 unit test, support float bias

* fix build script

* add conv compute unit test for arm

* fix build script, test=develop

* fix fp32 dw conv3x3s1, test=develop

* add fp32 dw conv3x3s1, test=develop

* add armv7 fp32 dw conv3x3s1, test=develop

* add fp32 depthwise conv3x3s2, test=develop

* fix fp32 conv3x3 depthwise build error, test=develop

* fix gemm_like conv trans weights error, test=develop

* fix int8 depthwise conv3x3 error, test=develop

* turn on all test for arm fp32 conv, test=develop

* fix int8 conv1x1 error

* fix int8 direct conv3x3s1 error, test=develop

* fix int8 direct conv3x3s2, test=develop

* turn on all test for arm int8 conv, test=develop

* fix int8 fc error, change mobilenetv1-int8 ground-truth result to fluid, test=develop

* remove debug info, strip ut binary, test=develop

* fix conv compute error, test=develop

* change Init() to ReInitWhenNeeded(), test=develop

* fix code style, test=develop

* remote engine_test, test=develop

* fix building server tests error, test=develop

* fix sdot clang build error, test=develop

* fix sgemm ut timeout error, test=develop

* fix clang build error, test=develop

* turn off math basic test due to ci time out, test=develop

* fix conv_int8 ut error, test=develop

* modify norm kernel to run caffe_facedetection model

* reserve bind norm, remove calc of norm output

* fix new_scale & new_bias crash test=develop

* fix new_bias & new_scale in GPU test=develop

* add fill_constant_batch_size_like op and add its unittest

* [Cxx API] add build-in version info

* update: add version.h.in template

* fix: fix build_fpga.sh WITH_TEST=OFF
     add build_fpga publish_inference fpga dir

* fix: fix build_fpga.sh WITH_TEST=OFF
     add build_fpga publish_inference fpga dir
     test=develop

* fix yolo_box bug, test=develop

* fix test bug for yolo_box, test=develop

* add x86 gru&&relu&&sequence_expand_as op test=develop

* checkout if passes match targets and kernels, test=develop

* add pass_utils, test=develop

* fix lite/core/mir/pass_registry.h, test=develop

* improve code styles, test=develop

* fix spell error, test=develop

* add opencl  depthwise_conv_trans_op

* test=develop

* Optimal OPENCL conv_3x3S2 Performance

* test=develop

* Optimal OPENCL conv_trans_3x3s2 Performance , test=develop

* add opencl conv_trans_op, test=develop

fix bilinear-interp unit test for more cases

test=develop

add math function: lstm  and selected_rows into lite/x86/math
add selected_rows and rw_lock into lite/fluid
add lstm_cpu_kernel and  lstm_kernel into lite/x86/detail

* add unsqueeze and range op. modify concat op test=develop

* modify exception in range_test_x86

add transpose kernel for cuda

* add opencl  depthwise_conv_trans_op

* test=develop

* Optimal OPENCL conv_3x3S2 Performance

* test=develop

* Optimal OPENCL conv_trans_3x3s2 Performance , test=develop

* make passes related to the device type, test=develop

* improve tips, test=develop

add slice op, reshape op,  reshape2 op, squeeze op and squeeze2 op and their unittests for x86

test=develop

* add assign_value op, arm kernel and test, add fluid_type, test=develop

* add hard_sigmoid, test=develop

* use image and new imple to test detection model, delete faster_rcnn_test, test=develop

fix model_optimize_tool error when using host kernel, fix reshape op build error on ios, test=develop (#1984)

* add opencl  depthwise_conv_trans_op

* test=develop

* Optimal OPENCL conv_3x3S2 Performance

* test=develop

* fix vector out of range crash test=develop

* fix style test=develop