Collective-plonetruegallery

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- fixes for Slideshow 2 in IE9
If you're using custom styles for the Slideshow 2 gallery, please
test this upgrade as some styling changes have been made.
[vangheem]

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- fix plone 4.1 compatibility issue. Closes http://plone.org/products/plone-true-gallery/issues/45
[vangheem]

- reference all css and js with absolute urls
[vangheem]

- no longer server slideshow js from js registry
[vangheem]

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- Add a Gallery Setting for Slideshow type to allow omitting the link to
images. (https://plone.org/products/plone-true-gallery/issues/44)
[khink]

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- remove the restriction on requiring picasa web album accounts to
end with 'gmail.com'. Fixes http://plone.org/products/plone-true-gallery/issues/41
[vangheem]

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- Enable re-use of view template macro. collective.collage.plonetruegallery
uses this.
[khink]

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- added spanish translation
[Enrique Perez Arnaud]

- use ViewPageTemplateFile since you can get UnicodeDecodeError with
non-ascii characters in the title and description.
[Enrique Perez Arnaud]