This also fixes #86.

This was long overdue, now running ./accept.lhs on a clean test from
master will not generate a bunch of changes.

Because the change is in GHC 7.9 and we now work against 7.8.3, this
test no longer makes sense. We revert it until 7.10 becomes the standard
version. If anything, there should be a test for this in GHC itself.

I get rid of the Monoid instance because we weren't satisfying the laws.
Convenience of having <> didn't outweigh the shock-factor of having it
behave badly.

This reverts any changes that were made to have Haddock compile with
7.9. When 7.10 release comes, we can simply re-apply all the patches and
any patches that occur on ghc-head branch from now on.

This allows us to build master with 7.8.3

This reverts commit 08aa509e.

This reverts commit dba02d6d.

This reverts commit 8d20ca8d.

This reverts commit cb96b4f1.

This reverts commit 8ac42d33.

This reverts commit b99b57c0.

This reverts commit d59fec2c.

There seems to be memory and speed improvement.

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Conflicts:
	src/Haddock/Interface/Create.hs

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Conflicts:
	src/Haddock/Interface/Create.hs