The scene now owns its renderer, so there is no need to keep a list
of existing renderers and to call Renderer::Get().

Seems to still build in lol, will check other works to be sure

- Most recent version is in with index buffer support

We already have the convenient degrees() and radians() functions to convert
between angle formats. This commit involves a lot of refactoring here and
there and I may have missed some places where conversions were needed. But
hopefully there aren’t may such places.

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.

Big FAT pass on windows-warning. It is better now.

scene so that g_scene can be deprecated later.

classes instead of Video.

to show how it can be used.

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.

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.

personal taste.

it's a bit less confusing.

needs to know about Direct3D headers etc.