Freetype update
Added absolute paths support in add_file_ios_app
Removed CMAKE_OSX_SYSROOT option for iOS
Patched libcxxabi to support static linking
Added support for more pip libraries
Added link to custom libcxx libraries for iOS
Fixed iOS host
Improved portability of bzip2
Ported OpenCV to iOS
Ported libcxxabi to iOS
Ported curl-asio to iOS
Fixed arabica compilation architectures
Added boost_log -> boost_filesystem dependency
Fixed definition of BOOST_SPIRIT_THREADSAFE

Using the INTERFACE_COMPILE_DEFINITIONS properties does not allow
transitive transfer of the flags to arabica-dependent projects
Ported ICU to iOS
Ported libpng to iOS
Ported libcxx to iOS
Added ImageMagick as 3rd-party library
Added curl-asio -> libcurl dependency
Ported jsoncpp to iOS