plone: changes to buildout-dependencies and wgo.installsite

[Carsten Senger <senger rehfisch de>]

Hi all,

I have switched wgo.installsite's contentim-/export from using 
GenericSetup (portal_setup) to collective.plone.gsxml.
GenericSetup's setuphandler for content does not handle binary data 
(images, files) and References between content. gsxml does.

I also added two convinience-views <sandbox>/@@wgo-import and 
/@@wgo-export to im- and export all content of a sandbox and a script to 
update an svn working copy with the content exported from a sandbox.


This change introduces new dependencies that are not handled by the 
buildout:
- lxml (that implies libxml2 and libxslt)
- the python-bindings for libxml2.

There is plone.recipe.lxml, that installs lxml, libxml2 and libxslt, but 
it compiles all of them everytime buildout runs. That takes minutes. 
More important, it does not install the python-bindings and I can't get 
it to.

To meet the dependencies

- install python-libxml2 and python.lxml (on Ubuntu Hardy) if you use
  the system's pyhton,

or

- install the python bindings for libxml2 in the python-installation you
  use:

    - get libxml2_ 2.6.x >= 2.6.28
    - untar and cd into the python-subdirectory
    - run `/path/to/the/used/python setup.py install`

- install lxml::

    `/path/to/the/used/python's/easy_install lxml


..Carsten


.._libxml2: http://xmlsoft.org/downloads.html