We used to have lol::map::empty() to empty maps, but in std::map
this method is called clear(). It sounds safe to harmonise between
our types and have lol::array::clear() too.

From now on, msg::debug will not display anything, unless this is a debug
build, or the LOL_DEBUG environment variable is set.

This allows actors to perform draw commands in TickDraw(), even
if it’s not exactly what we want in the future.

Not all programs support this feature for now, but that’s because they
don’t support the scene framework either, and will need patching. Also
the default postprocess is deliberately exaggerated for now.

Now TickDraw() can be called several times per frame, because we
may have several scenes. This is expected, but it will require
some adjustments later.

Using “Array” instead of “array” is now fully deprecated, and I replaced
the Log::Debug() etc. functions with msg::debug() etc. because log:: was
unavailable due to being a maths function.

Added up-to-date copyright notice and BOM to modified files, just in case.

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.

Though it still is not possible to create a new window from a thread that did not init SDL

Scene rendering logic is now better

scene so that g_scene can be deprecated later.

core: calling InitGame() at the first tick of an entity. InitDraw is still uncalled yet
fixed mrpigeon and orbital accordingly

optimisation flag -Os instead of -O3.

that lets us draw integer random values too.

messages in the Ticker class are now full asserts.

LOL_RELEASE are set by msbuild, and use the debug PSGL on the PS3.