Collective.prettyphoto

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- Fixed install issue with Plone 4 (Large Plone Folder was removed).
[hpeteragitator]

- Set version in metadata.xml to 1, since this has nothing to do with the package version.
[tmassman]

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- Fixed version numbers and missing upgrade steps.
[tmassman]

- Added custom browserlayer.
[tmassman]

- Upgrade to prettyPhoto 2.5.6
[tmassman]

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- Don't fail when installing on sites w/o kupu (plone4 compatibility).
[fRiSi]

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- Fixed wrong kupu styles.
[tmassman]

- Added iFrame support (use 'prettyPhoto Iframe Link' for external sites)
[tmassman]

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- Initial release
[tmassman]