- IPP is disabled by default when compiler is mingw (couldn't make it
work)
- fixed some warnings
- fixed some `__GNUC__` version checks (for correctness and convenience)
- removed UTF-8 BOM from hough.cpp (fixes #5253)

Add Android HardFP support. Expose the "armeabi-v7a-hard with NEON"
ANDROID_ABI.

TEST= Add -DANDROID_NATIVE_API_LEVEL=21
-DANDROID_ABI="armeabi-v7a-hard with NEON"

to compile with hardfp. Checked the output of make verbose to
confirm -lm_hard is being linked. There are known test
failures but that can be fixed once this is in.

of WINRT samples

This removes requirement to add OPENCV_WINRT_INSTALL_DIR with backslash in the end

in case trailing slash is presented VS handles duplicated slashes w/o issues

Updates README to reflect setup_script build capabilities and requirements to setup binaries and includes for sample applications. Fixes #24

Signed-off-by: Maxim Kostin <v-maxkos@microsoft.com>

Added build script to automate generating, building and installing OCV for WinRT, WindowsPhone 8, WindowsPhone 8.1. Added readme and .bat script wrapper. Added standalone script to build and install pre-generated projects.
Signed-off-by: Maxim Kostin <v-maxkos@microsoft.com>

Use find_program() to set CMAKE_C_COMPILER and CMAKE_CXX_COMPILER.

Originally the variables was set to compiler name, without absolute path.
CMake 3.0 tries to find them in CMAKE_FIND_ROOT_PATH (since 
CMAKE_FIND_ROOT_PATH_MODE_PROGRAM was set to ONLY) and fails.