Request for review: type-annos/langtools -> tl/langtools

[Jonathan Gibbons]

The project forest has a number of updates ready for integration

* renumbering of TargetType constants
* implementation of method/constructor references
* support for casts with intersection types
* fix bug in erasure of a type variable with annotated upper bound,
* fix bug in attributing lazy constant values.

http://cr.openjdk.java.net/~jjg/8008077/webrev.00/

Werner, please double check these bits are as expected.

-- Jon