Impl for javax.lang.model API

[Jonathan Gibbons]

Werner,

I have an initial impl of the new javax.lang.model API, and some initial 
tests.

One test is failing:  given an ExecutableType, the list returned by 
getParameterTypes is not returning parameters types with type 
annotations, when I think it should.  In particular, a toString() of the 
ExecutableType does not indicate any type-annotated parameters, although 
it does show type annotations on the return type and thrown types.

What is the best way to proceed here?  Should I push the "work so far" 
to the type-annotations forest for you to investigate?

-- Jon