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.

Add String.split(char) to split into an array, and add a simple
char const * + lol::String free operator.

There might be issues with lolremez but at first sight it seems to work.

This doesn’t work properly yet because PICO-8 uses a few language
extensions; we will have to decide whether to modify the Lua
interpreter, or change the code on the fly, or something entirely
different.

Various changes in GCC, clang, and libflex had triggered build failures.

This avoids silly mistakes when calling radians(180) instead of
radians(180.0). The first one used to return 3 instead of 3.14159…

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 name “re” came from “reciprocal” but since we have “inverse” for
matrices, I thought it would be nice to make everything consistent.

This is to avoid confusion with Scene::AddTile().

The old public API is maintained for now but should be considered
deprecated.

This lets us use the code for non-float variable types. I also got
rid of the mat4-to-quat code so that users are forced to use the
mat3-to-quat code and possibly discover places where their code is
suboptimal.

- removed 0 CR characters
 - removed 12 trailing whitespaces
 - replaced 0 tabs with spaces
 - fixed 15 svn:eol-style properties