Delete the old `analysis' directory.

analysis/README.txt:
    Shift the contents of this file in to compiler/notes/analysis.txt.

analysis/:
    Delete this directory and the remainder of its contents.
    We only kept it around in order to workaround limitations of CVS
    and since we no longer use that we don't need to any more.
Turn the old analysis README file into HTML.

compiler/notes/analysis.txt:
   Rename this file to analysis.html.

   Add HTML markup.

   Update the link to Nick's thesis.

   XXX quite a bit of this is still out-of-date.

compiler/notes/index.html:
     Add analysis.html.