In oder to guarantee SIMDness between the two compilation steps we choose the
highest SIMD size that is optimized in the kernel for the first step.

QPushButton was included twice.

As is it was not possible to use CUDA.

not only print file-not-found as a warning but also print the name of the problematic file and the uri used for the open attempt

dotProd_16s - disabled for IPP 9.0.0;
filter2D - fixed kernel preparation;
morphology - conditions fix and disabled FilterMin and FilterMax for IPP 9.0.0;
GaussianBlur - disabled for CV_8UC1 due to buffer overflow;
integral - disabled for IPP 9.0.0;

IppAutoBuffer class was added;

Fix the failed assertion by replacing the GEMM call.

Also random numbers are generated from normal distribution ~N(0,1),
instead of uniform distribution ~U(0,1).

The latest version (5.1.1) of the gnu compiler returns just its major version ("5") when given the "-dumpversion" argument. Gnu compiler developers don't consider this to be an error. A workaround for this case has been made.

now it builds by the command:
`cmake.exe -Wno-dev -GNinja -DCMAKE_MAKE_PROGRAM="path\to\ninja\ninja.exe" -DCMAKE_TOOLCHAIN_FILE=../opencv3/platforms/android/android.toolchain.cmake -DANDROID_ABI="armeabi-v7a with NEON" -DANDROID_SDK_TARGET=21 -DANDROID_NATIVE_API_LEVEL=14 -DCMAKE_BUILD_WITH_INSTALL_RPATH=ON -DBUILD_ANDROID_EXAMPLES=ON -DINSTALL_ANDROID_EXAMPLES=ON -DWITH_OPENCL=YES -DANDROID_OPENCL_SDK=path\to\OpenCL ../opencv`

adding missing images from python tutorials, like chessboard.png, simple.jpg, home.jpg, fly.png, ...

refactored; added Camera2, notify callbacks, front/back maxCamera sizes; disable new stuff if target API < 21