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/benchpress.toy

@@ -0,0 +1,17 @@
+//calculate the nth fibonacci number, and print it
+
+var counter: int = 0;
+
+var first: int = 1;
+var second: int = 0;
+
+//BUG: This causes a stack overflow
+while (counter < 100_000) {
+	var third: int = first + second;
+	first = second;
+	second = third;
+
+	print third;
+
+	++counter;
+}