[IronPython] More makefiles

[Edd Dumbill]

I made Makefiles to build IronPython from scratch under Mono.  They can
be checked out of subversion from here:
http://svn.usefulinc.com/svn/repos/trunk/ironpython/makefiles/

I use a silly little hack to build IronPython.dll twice, the first time
without the SystemUtil reference, avoiding the need to have a
SystemUtil.dll binary as a build prerequisite.

Things that need adding to the Makefiles include

 * option to exclude external code
 * installation rules
 * convenience wrapper script generation

If you're using these Makefiles on Windows I you will need cygwin.

-- Edd