Ftw.calendarwidget

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- Prepare for public release.
[jone]

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- Fix Manifest.in (include .rst)
[mathias.leimgruber]

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- Code cleanup and documentation.

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- Little bit refactoring, because of some js errors.
Added calendar_after_change jquery event on at-field-wrapper element.
[mathias.leimgruber]

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- Fix default_date (for IE7).
[mathias.leimgruber]

- Clean up js code for IE7/8.
[mathias.leimgruber]

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- removed unused browserlayer
[mathias.leimgruber]

- fixed resources
[phgross]

- change collective.jqueryui to collective.js.jqueryui and fixed
some templates for plone4 support
[phgross]