Fixing pyatspi upgrades from squeeze

[Josselin Mouette]

Hi all,

as mentioned in #691160, in some cases APT fails to provide a clean
upgrade path from python-pyatspi to python-pyatspi2.

Since both packages are binary-compatible, the python-pyatspi2 package
should never have existed in the first place, but it’s a bit late for
that. I think the easiest way to make APT’s job easier is to remove the
current python-pyatspi package. Hence we can have 2 scenarios.

A: 
     1. Make python-pytaspi an empty package depending on
        python-pyatspi2. 
     2. Make the conflict a versioned one. 
     3. Remove the Provides in python-pyatspi2.

B: 
     1. Remove python-pyatspi from the at-spi source package. 
     2. Rename python-pyatspi2 to python-pyatspi. 
     3. Make python-pyatspi2 an empty package depending on
        python-pyatspi.

In both cases this needs a synchronized upload of at-spi and pyatspi2.

A11y maintainers: what are your thoughts?
Release team: would you accept such a change for wheezy?

Cheers,
-- 
 .''`.      Josselin Mouette
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