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/leapyear.toy

@@ -0,0 +1,8 @@
+//BUG: Not yet functional
+
+//find the leap years
+fn isLeapYear(n: int) {
+	if (n % 400 == 0) return true;
+	if (n % 100 == 0) return false;
+	return n % 4 == 0;
+}