[MLton] IncludeSVN

[Matthew Fluet]

>> The IncludeSVN macro (see http://mlton.org/WikiMacros) would be even more
>> useful if one could specify a range of lines (suitably flexibly) to be
>> displayed instead of the whole file.
>
> That should be simple enough.  One current deficiency with the various SVN 
> related WikiMacros is that they are hardwired to "mlton/trunk".  That is easy 
> enough to fix as well.

The various SVN related WikiMacros are now hardwired only to the root of 
the mlton.org svn repository.

Also fulfilled Vesa's feature request.  See http://mlton.org/WikiMacros.