lsynth: Extract description and usage from source.

lsynth/README.md

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+# LSynth
+
+LDraw CAD system compatible flexible part synthesizer.  This program
+reads your LDraw file, searching for unofficial META commands (structured
+comments), that specify things you want synthesized.
+
+### What does it do?
+
+LSynth has two primary forms of synthesis.  The first kind of synthesis
+creates hose like things including:
+    rubbed, rubber, pneumatic, and flex system hoses, as well as electric
+    and fiber optic cables, flex system cables, flexible axles, string, and
+    minifig chain.
+
+It also creates things that travel around circular lego parts.  Things
+like:
+    rubber band, rubber belt, technic chain, technic plastic tread, technic
+    rubber tread.
+
+The files tube.c, tube.h, curve.c and curve.h perform hose synthesis.
+The files band.c and band.h perform band synthesis.
+
+This file (main.c) contains the main entry/exit points for the program.
+It opens and scans the LDraw file provided, identifies synthesis
+synthesis specifications and hands them off to the appropriate synthesis
+methodology.
+
+### Usage
+
+`lsynthcp [-v] [-h] [-m] [-l] [-p] <src> <dst>`
+
+- -v: prints lsynthcp version
+- -h: prints this help message
+- -m: prints out the LSynth portion of the MLcad.ini for using this program
+- -l: format the output as an official ldraw part
+- -p: prints out the full path name of the this executable
+
+The easiest way to use LSynth is from within MLcad.  You need to
+make additions to MLCad.ini.  Please see [Willy Tscager's tutorial
+page](http://www.holly-wood.it/lsynth-en.html).
+
+To create a flexible part, you put specifications for the part
+directly into your LDraw file, where the part is needed.