The Great Multi-Parameter Type Classes Merge.

Notes from Simon (abridged):

* Multi-parameter type classes are fully implemented.
* Error messages from the type checker should be noticeably improved
* Warnings for unused bindings (-fwarn-unused-names)
* many other minor bug fixes.

Internally there are the following changes

* Removal of Haskell 1.2 compatibility.
* Dramatic clean-up of the PprStyle stuff.
* The type Type has been substantially changed.
* The dictionary for each class is represented by a new
  data type for that purpose, rather than by a tuple.

Added an overview section, commented out some of the more bogus parts of the document (but some bits still remain)

add nofib/GHC_ONLY/array002 to the array test suite.

Add numeric tests from nofib/GHC_ONLY.

I was *sure* I'd removed these before...

protect part of the binary-dist rules against 'for i in ; do ...'.

patch level 1

Some shells have problems with 'for i in ; do ...', so protect the
relevant for loops with 'if test <string>; then ...'.

Replace three 'test ... && ...' sequences with 'if ... then ... fi',
since the test form would fail, causing some non-GNU makes to bomb
out (maybe they invoke sh with -e?).

compile simplStg/UpdAnal.lhs with -fno-strictness until the strictness
analyser bug is fixed.

portabilify a test.

remove some superfluous-looking parenthesis around a test.

fix a couple of typos.

remove support for using the Happy from the tree.

reinforce the test for Happy: version 1.4 or later is now *required*

put note about Happy being separated out.

add a .sgml->.tex rule

fix for the getWorkerIdAndCons bug.

add a few more change notes.

print idinfo with a BigCoreBinder.

a few changes to the 2.10 announcement

use PACKAGE_BINS to get the actual binaries to install.

set GhcBinDistBins.

add PACKAGE_BINS for a binary_dist.

don't split objects for way "mr" too.

bump a few heap sizes to be on the safe side.

hi file comes out on stderr, not stdout.

add test for getWorkerIdAndCons bug.

Move array tests from ghc/lib to ghc/tests and put them in our test
framework.

add subdirectory 'array'.

Move array tests from ghc/lib to ghc/tests and put them in our test
framework.

Cleaned out old defnition of lex_id

Having unbalanced parantheses inside cpp macros
is also Bad, Bad, Bad.

fix bug in sameVal on ApproxFuns.

correct typo in bindist configuration stuff.

Remove comma from SLIT (upsets GNU cpp on some (all?) platforms.)

Renamed -fwarn-overlapped-patterns to -fwarn-overlapping-patterns to match driver (and docs.)

Removed PARSER_VERSION (unused)

Better error message when trying to declare CCallable & CReturnable instance of abstract type