Compare against scalac in test suite.

Now tests only fail if scalac can parse it, but we can't.
Also fixed one more source for which that was true - scala
xml's "unparsed" had not been implemented.
Parsing super[A].B.

Parsing code of the form.

  trait Transformed[+B] extends super[GenSeqViewLike].Transformed[B]
Looking into pathological performance spots.
Begin the long slow process of selling out elegance for performance.
19826 tests: 19826 pass, 0 fail, 0 skipped

Lots of little fixes in here.
gitignore.
The kind of generalization we're after.
Playing with abstract interface.
Reconsolidating template rules.
Unifying value constraints.
Unifying defs and dcls.
Fully unified defs and dcls.