Move to libxml++ 2.6

As far as I know, the patch never made it to libofx's upstream. I commited =
the =

necessary patch (it builds, but I don't have a server against which to test =

ofxconnect).

This was at libxml++ debian maintainer's request: http://bugs.debian.org/cg=
i-
bin/bugreport.cgi?bug=3D467364
-- =

Benoit Gr=E9goire, ing., PMP, PSM

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