* [LITE][OPENCL] support image2d. test=develop

* add context changed with consider image*. test=develop

* add layout, relu image kernels. test=develop

* replace image_data with data, mutable_image_data with mutable_data, test=develop

* comment unused var. test=develop

* remove unused var. test=develop

* fix yolobox_cuda bug 
* update code format

1. improve n-fold quantification algorithm by introducing a minimal size for each fold. 2. automatically search for best n for n-fold algorithm. (#2167)

* [CMAKE] Abandon strip when CMAKE_BUILD_TYPE=Debug

* Add CMAKE_BUILD_TYPE info in cmake. test=develop

* 1. add quantification_fold parameter. 2. support quantification test in run.py.

* implement n-fold quantification

*  imporve prepack_input func speed in int8 3x3s1 dw conv

* fix code style

* fix code style

* improve 3x3s1 dw fp32 conv speed a little

* arm add 5x5s1 int8 dw conv, test=develop

* open cl mem optimise, split with cpu codes.
fix a bug when some memory is not equal 4 .

* open cl mem optimise, split with cpu codes.   fix a bug when some memory is not equal 4  fix bad des

* add conv int8 support(in condition which the input or output channel not be the times of 4)
add add_kernel for cuda.

* can run yolov3 fp32
test=develop

* 1. fix bug with yolov3 run
test=develop

* get opencl kernel_work_group_size and set local_work_group_size for conv and conv_trans kernel of GAN, test=develop

* fix fpga CI error, test=develop

* fix fpga CI error, test=develop

* auto set local work group size according to devices

* Optimal OPENCL conv_trans_7x7 Performance , test=develop

* fix CI error, test=develop

* fix fpga ci build error. test=develop

* fix fpga ci build error. test=develop

* add cast from uint8 to float, test=develop

* fix compiling and fix code style test=develop

test=develop

* add full_api_static target and fix building errors, test=develop

* fix build errors, test=develop

* fix code style, test=develop

* fix lite/model_parser/pb/var_desc.cc, test=develop

* fix building errors, test=develop

* modify lite/tools/debug/CMakeLists.txt, test=develop

* fix building model_optimize_tool error on mac, test=develop

* fix model_optimize_tool build error, test=develop

* fix: fix model parser and save bug

* style: delete debug code

* fix: fix light_predictor program run model with subblock bug

(1)modify tiny publish so to make it excutable
(2)modify the bug of compiling in armlinux
(3)change 3 full publish so into 2