Initial implementation if ugc, see #16; Fix tests

examples/ugc/README.md

@@ -0,0 +1,20 @@
+μgc garbage collector
+=====================
+
+A port of [Bach Le's μgc garbage collector library](https://github.com/bullno1/ugc) to AssemblyScript.
+
+Instructions
+------------
+
+To build [assembly/ugc.ts](./assembly/ugc.ts) to an untouched and an optimized `.wasm` including their respective `.wast` representations, run:
+
+```
+$> npm run build
+```
+
+Afterwards, to run the included [test](./tests/index.js):
+
+```
+$> npm install
+$> npm test
+```