Improve dang-math function names.

[Possseidon]

This is regarding function names such as:

Vector::normalize();

From the name of the function, one might expect this to normalize the vector in place, however a new vector is returned instead. A better name (albeit slightly longer) would therefore be normalized.

Go through the entirety of dang-math and fix the names.

Also update Lua bindings:

• Use properties for functions such as normalized or solvable.
• Add getNormalized or isSolvable methods to still allow use in a functional sense.