+ - Performance
+
+ - Forest: keep() and valid() -- can we do this with states
+ rather than subtrees?
+
+ - hash Long->long: it's all bogus
+
+ * pick back up cleaning up end of Parser.java (Reduction)
+
+ - [more] sensible tree-printout
+
+ - revamp Tib.Block (do it all in the parser using indent/dedent?)
+
+ - more natural phrasing of metagrammar?
+ - finalize metagrammar and rdp-op's