- doku update
- folder name cleanup should only happen to normal folders but not to picasa album names.
- added cart disabled page
- improved redirect for empty cart
- removed some strict warnings while rendering images
- removed some strict warnings while in the events list
- avoid fail to render an image because of invalid EXIF data
- added strip_tags to folder description if showed as meta data
- added support for menu based keywords and robot configuration
- doku update
Merge branch 'v2.6.6'

Conflicts:
	admin/doc/readme.md
	site/controller.php
	site/views/event/view.html.php
	site/views/events/view.html.php
	site/views/resizeimage/view.html.php
	site/views/singleimage/view.html.php