Changed documentation to indicate that GHC 6.6 is required.

We will no longer support GHC 6.4.


git-svn-id: https://pandoc.googlecode.com/svn/trunk@603 788f1e2b-df1e-0410-8736-df70ead52e1b

INSTALL

@@ -2,19 +2,13 @@
 
 # Installing GHC
 
-To compile Pandoc, you'll need [GHC] version 6.4 or greater.  If
+To compile Pandoc, you'll need [GHC] version 6.6 or greater.  If
 you don't have GHC already, you can get it from the [GHC Download]
 page.
 
 [GHC]: http://www.haskell.org/ghc/
 [GHC Download]: http://www.haskell.org/ghc/download.html
 
-If you're using GHC 6.4, you'll also need to install the
-[Text.XHtml] library.  This library is included in the standard
-hierarchical libraries in GHC 6.6.
-
-[Text.XHtml]: http://www.cs.chalmers.se/~bringert/darcs/haskell-xhtml/doc/
-
 You'll also need standard build tools: [GNU `make`], `sed`, `bash`,
 and `perl`.  These are standard on unix systems (including MacOS
 X).  If you're using Windows, you can install [Cygwin].

web/index.txt

@@ -21,7 +21,7 @@ Pandoc is free software, released under the [GPL].
 **Source distribution:** [`@TARBALL_NAME@`].
 To install, unpack the archive and follow the instructions in the
 [INSTALL](INSTALL.html) file. You'll need the [GHC] Haskell compiler,
-version 6.4 or higher.
+version 6.6 or higher.
 
 **MacOS X binary package:** [`@OSX_DMG_NAME@`].
 To install, just double-click the package icon in the disk