Mergining libtrianlges

auger() actually builds augers with all params

Added 2D shapes and layout modules

Removed test_libtriangles. I was under the mistaken impression is provided a set of examples, so you could see at a glance the result of the code. This doesn't really need a test function.

radii is used instead of diameters, has a taper parameter that will change how much the blade tapers at the end

Added license info from http://www.thingiverse.com/thing:6118

clarify that there are no wildcards in OpenSCAD use/include statements

fonts.scad

Added fonts.scad to use with OpenSCAD search() function

Wrapper modules for rendering outline and bold text from a set of font
points and paths.

Example font to take advantage of search function added to OpenSCAD.

minor fix: Use correct use convention in documentation - from kintel

Involute order && chmod - from kintel