Changes to haddock(2)

Changes to haddock:
commit 82ab2c09c19641e0ea89965c9af291043798486d
Author: Niklas Haas <git@nand.wakku.to>
Date:   Sat Mar 15 15:17:18 2014 +0100

    Fix issue #281

    This is a regression from the data family instances change. Data
    instances are now distinguished from regular lists by usage of the new
    class "inst", and the style has been updated to only apply to those.

    I've also updated the appropriate test case to test this a bit better,
    including GADT instances with GADT-style records.

commit 48f45676f7c6c79b249b51dde9a6791393860676
Author: Niklas Haas <git@nand.wakku.to>
Date:   Sat Mar 15 15:15:44 2014 +0100

    Hide minimal definition for only-method classes

    Previously this was not covered by the All xs check since here it is not
    actually an All, rather a single Var n.

    This also adds the previously missing html-test/src/Minimal.hs.