experimental XMLRPC support

This adds experimental XMLRPC support to DokuWiki. A subset of the
Wiki XMLRPC API v2 [1] is implemented.

You need to remove the die() call in lib/exe/xmlrpc.php to use it.

[1] http://www.jspwiki.org/wiki/WikiRPCInterface2

darcs-hash:20061124232744-7ad00-fdaccc68787c3b0349b155a94a1a56003560c5d8.gz