Added support for the new web service API methods to update and

delete person attributes.

Updated generate-client-methods.py: it now needs to handle multiple
methods under the same second-level resource node in the WADL. This
happens when 2 methods share the same path and path parameters (as
the update and delete methods do).

Improved the datatype handling in generate-client-methods.py, so that
int/Integer, long/Long, etc are supported. Also when these are used
as path parameters, they need to be converted to strings.

Added "owningGroupid" to the IbisAttribute DTO (for person attributes
only), since this is useful to clients when deciding which attributes
to update.

Changed IbisError.code to an XML element rather than an attribute,
since it could be arbitrary text.

Changed IbisInstitution.instid and IbisGroup.groupid to XML
attributes rather than elements, to be more consistent with other
ID-like attributes.

--
Imported using git-svn from
https://dev.csi.cam.ac.uk/svn/lookup/trunk@14