[racket-dev] 5.0.2 changelog

Please find your name below and provide some blurb for the 5.0.2 changelog

Author: Jay McCarthy <jay at racket-lang.org>
    - Adding define-datatype to ASL
    - PLAI changes
    - Webserver changes

Author: Sam Tobin-Hochstadt <samth at racket-lang.org>
    Faster loading of TR files?

Author: Casey Klein <clklein at racket-lang.org>
    redex things?

Author: Matthew Flatt <mflatt at racket-lang.org>
    Modules spliced at the file level instead of collection level.
    Internal definitions for `when', `unless', `cond', `case', and `match'
    #true and #false forms

Author: Robby Findler <robby at racket-lang.org>
    - Check syntax changes
    - triangle primitives

Author: Jay McCarthy <jay at racket-lang.org>
    - New hash functions

Author: ryan
       - data/gvector
       - syntax/parse updates