Remove globals

Removed the previous pollution of the global namespace.

WARNING! THIS CAN BREAK COMPATIBILITY!

Now instead of

require("yalg")

local G = GUI(VDiv(...

You do like this:

local Y = require("yalg")

local G = Y.GUI(Y.VDiv(...

To update, you should look for:

• GUI
• VDiv and HDiv
• Button and Label
• Switcher
• Font and rgb

There's an easy convenience fix for kind-of backward-compatibility:

require("yalg").import()
local G = GUI(VDiv(...

This simply copies into the global namespace, which is NOT recommended, and only there for backwards compatibility!

Also added a "nice" build script to automate copying the files into one. It's ugly af, but works...