Fixed parser weirdness. More readable parser finished.

For whatever reason, writing the parser in Groovy was causing weird errors
to occur when the parser or parse runner was created. Using a plain Java
source file fixed this.

src/test/TestParser.java

@@ -0,0 +1,27 @@
+import org.parboiled.BaseParser;
+import org.parboiled.Parboiled;
+import org.parboiled.Rule;
+import org.parboiled.annotations.BuildParseTree;
+import org.parboiled.parserunners.ReportingParseRunner;
+import org.parboiled.support.ParsingResult;
+import static org.parboiled.support.ParseTreeUtils.printNodeTree;
+
+@BuildParseTree
+public class TestParser extends BaseParser<Object> {
+
+    public Rule S() {
+        return OneOrMore(
+            Sequence(A(), OneOrMore(B()), C())); }
+
+    Rule A() { return Ch('a'); }
+    Rule B() { return Ch('b'); }
+    Rule C() { return Ch('c'); }
+
+    public static void main(String[] args) {
+        TestParser parser = Parboiled.createParser(TestParser.class);
+        ReportingParseRunner parseRunner = new ReportingParseRunner(parser.S());
+
+        ParsingResult result = parseRunner.run("abbbbcabc");
+        System.out.println(result.matched ?  printNodeTree(result) + "\n" : "No Match");
+    }
+}