Collective-saconnect

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- Nothing changed yet.

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- fixed packaging

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- Overhaul: autopep8/manual pep8, utf8-header, buildout/setup modernized
[jensens]

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- Include CMFCore's permissions.zcml under Plone 4, so the `cmf.ManagePortal`
permission is known.
[hannosch]

- Fix typo that prevented z3c.saconfig support from ever being enabled.
[elro]

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- Update z3cform dependency to plone.app.z3cform, and add include it's
configuration in configure.zcml.
[mj]

- Added optional support for z3c.saconfig connections; each connection
string in collective.saconnect automatically is registered as a z3c.saconfig
scoped session utility.
[elro, mj]

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- Fixed adding new entries after the editing fix.
[mj]