interface changes.

simple strings.

information of CondTrees is now a modifier.  Move CondTree resolution functionality. 

function to accept an arbitrary partial assignment of these
variables.

Used to be if __GLASGOW_HASKELL__ >= 604, but the 6.4 branch had a bug
which looks likely to be the cause of GHC build failures we're seeing:
-         procNextOpt (NonOpt x)   RequireOrder      = ([],x:rest,us,[])
+         procNextOpt (NonOpt x)   RequireOrder      = ([],x:rest,[],[])

The haddock --css flag is new. The old --hscolour=[path] flag got split
into two flags: --hyperlink-source and --hscolour-css=path

So now --hyperlink-source controles wether or not we run hscolour and
get haddock to link to the sources. The new flag --hscolour-css can
be used to override the css file that hscolour uses.
Also, the new flag --css can override the css file that haddock uses.

Some minor changes due to changes since the hscolour patch was written.
Make it work with haddock-0.8 by using %{MODULE} rather than %{FILE}
and generate output file names to match (ie not using the original file
extension, just using the module name for the output file).

Integration of Cabal, HsColour, and Haddock.
(Also fixes bug #102)

Seems to be based on GHC's -fcontext-stack flag, which takes an integer
argument.

As far as I can tell
(a) The -finline-phase flag stopped actually being accepted by GHC
    sometime between GHC 4.08.2 and GHC 5.04.3
(b) It took an Int argument