CMake

@thinking-tower added CMake functionality to the project.

Templates for days

I changed a lot of methods to take a djf_3d::Axis as a template parameter instead of as a regular function parameter and learned how to instantiate templated methods explicitly, thereby decreasing the amount of conditional branching in the code. I also changed CoordPair to Vec2f and CoordTriple to Vec3f, to make it less bizarre to people who (unlike myself) are familiar with other 3d engines.

djf-3d-2 v1.0

This is the first usable version of djf-3d-2.

There's no need to clone the repository if you don't plan on making changes to it; you can just follow the instructions in "install.txt" and have a working, system-wide library ready to use.

Don't use this one

dont-use-this

Update install.txt