Script tests re-added, all tests can run under gdb

Also fixed a minor bug with printing, and removed the ability to
configure the parser.

Added and updated QUICKSTART.md as a quick way to get people started.

There's some broken scripts under 'scripts/' that require functions to
work properly.

scripts/funky.toy

@@ -0,0 +1,20 @@
+//BUG: functions aren't working yet
+fn makeCounter() {
+	var counter: int = 0;
+
+	fn increment() {
+		return ++counter;
+	}
+
+	return increment;
+}
+
+var tally = makeCounter();
+
+while (true) {
+	var result = tally();
+
+	if (result >= 10_000_000) {
+		break;
+	}
+}