The containers no longer force the user to use the ptrdiff_t type for
size information. For convenience, size() now always returns an int,
and the size_s() method offers a way to handle arrays with more than
2 billion elements. Internally, we still use ptrdiff_t, though.

Since so much code had to be changed, I took the opportunity to get
rid of capitalised accessors for classes that are lowercase.

SDL2: Mouse is back ! With correct focus support
SDL2: Added typing support with keyboard
ShaderBuilder: Refactored and simplified Shader block creation
Several warning removal
Fixed Image::Copy

scene so that g_scene can be deprecated later.

classes instead of Video.

that 2-year old "temporary Win32 hack".

currently works for images (SDL and GDI+ loaders) and sound samples.

calls so that they take a number of vertices or indexes, not elements.

Shader::SetUniform override, and implement most of the FBO code for
the Direct3D backend.

projects, we now use Video::SetClearColor, Video::SetClearDepth and
Video::Clear instead, so that the Direct3D equivalents can be called.

it to DirectX.

on Windows if using Visual Studio; if using MinGW, try to stick to the
original main() entry point.

do not open a console at startup.

make sure each .vcxproj file is with its corresponding source code.

"half" class. The build is now 3% faster.

it's a bit less confusing.

class, so that the calling code does not need to know what the backend is.