Fix carousel tile so it does not break cover when dropping content with no image field (fixes #371)

- Remove galleria-inner CSS class form tile template and styles
- Add upgrade step to cook CSS resources

As a side efect, carousel tile is now fully responsive and image size used will match the one configured for the tile.
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Merge pull request #404 from collective/issue_371

Fix carousel tile so it does not break cover when dropping content with no image field
Merge pull request #403 from naro/master

jQuety 1.9 compatibility
Update changelog
Merge remote-tracking branch 'upstream/master'