Add test for pattern-match failure in do-notation

TH:
- We are forcing importing THSyntax.Q at every top splice now; this suffices
  to get simple splices that do not involve reifyDecl or declaration
  quasi-quotes to work.  NB: This worked already when the construction of the
  Dec term and the splice were in separated modules, but not when they are in
  the same (see the regression test "TH_spliceDecl1.hs").
- The tests "TH_spliceDecl2.hs" and "TH_spliceDecl3.hs" use toplevel splices
  together with quasi-quoted and reifyDecl.  These currently still fail, as
  importing of some of the required type constructors from THSyntax isn't
  forced.

Update expected output

TH: Revised type variable handling in toplevel decls (became necessary due to
recent addition of foralls in type representations).

Add output

Add Joaos circular program

Add tests for classes operations with a context but no for-all

Add a new deriving test

Seems (in DsMeta) as if reifyDecl should do class delcarations, too, but it
currently dies when applied to a class name.

More tests for reifyDecl

** reifyDecl currently barfs on "type" and "newtype" decls **

Add an implicit-parameter test

Update expected output

Started on regression tests for Template Haskell

Update expected output

Add two more module tests

tcfail098 fails now

Add a modules test

Add test moved from modules/

Wibble

Move mod133 to rename/should_fail to avoid conflict with Hugs tests

Test for unused bindings in mutual rec groups

Newtype record-selector test

A new test from Ross

Dont import a non-existent interface

Update expected output, and fix the source for rn017

update expected output

Add another read/show test, on records

mdo testsuite

Update expected output

add expected output

Add mdo test

Update expected output

Update expected output

update expected output (which was never right0

Dont use undecidable instances in this test

Update expected output

Update expected output with improved error messages

Add tests for rebindable syntax, courtesy of Ashley Yakeley

update expected output

update expected output