OpenSCAD Module_Help

I got tired of cracking open libraries that I wrote and trying to decipher the comments and documentation that I left for myself. Instead, I thought it would be nice if I could just `use ` and then call `help_libraryName()` to get a list of the available functions and module calls.

This is an attempt to add a standardized way of documenting modules.

The current version will be hosted on Git Hub: https://github.com/txoof/module_help

Add the module help_YourLibraryNameHere() {} to your OpenSCAD library to provide some
callable help.

Usage from an imported library:
//provide a list of all help topics in the "colors" library:

use
help_colors();

//output:
ECHO: "Available Help Topics in this Library:"
ECHO: "colorArray"
ECHO: "chord"
ECHO: "RGB"
ECHO: "RGBScale"
ECHO: "red"
ECHO: "redScaled"

//get help on a particular topic from the "colors" library:
help_colors("colorAray");

//output:
ECHO: "He