- dir structure (docs, tests, design)

- renderings for README.rst

tests/test.scad

@@ -0,0 +1,26 @@
+/*
+Test and demonstrate thread library
+
+:Author: Adrian Schlatter
+:Date: 2019-04-07
+:License: 3-Clause BSD. See LICENSE.
+*/
+
+use <threadlib/threadlib.scad>
+
+echo ("threadlib version: ", __THREADLIB_VERSION());
+
+type = "M12x0.5";
+turns = 5;
+Douter = thread_specs(str(type, "-int"))[2] * 1.2;
+
+echo(thread_specs(str(type, "-ext")));
+intersection() {
+    color("Green")
+        translate([-1000, 0, -1000])
+            cube(2000, 2000, 2000);
+    union() {
+        bolt(type, turns);
+        nut(type, turns, Douter);
+    };
+};