unwrap: Use constants from math.h in C code.
unwrap: Convert 2D C code from float to double.
unwrap: Use UNIX line endings.
unwrap: Change 2D wrapper code from float to double.
unwrap: Change 3D C code from float to double.
unwrap: Change 3D wrapper code from float to double.
unwrap: Change 1D unwrapper from float to double.
unwrap: Simplify code after completing float->double.