Fixed option to disable the cart.
- added ability to keep exif during thumb generation.
added some exif information to the database.
- social sharing configuration options added
- added new shapes
changed buttons and configuration option for addthis
readme update
added social sharing options
fixed memory leak while reading files.
fixed warnings while accessing exif data which do not exist.
added another exif lib since the other had a memory issue.
changed exif lib again, memory issue should be gone now.
- social media buttons are by default disables
- the button bar now fades in/out
fixed exception if the image has only some exif information.
added support for closing the social media toolbox on mobile
updated readme
fixed focal length calc.
Merge branch 'v2.6.6'

Conflicts:
	admin/controller.php
	admin/language/en-GB/en-GB.com_eventgallery.ini
	eventgallery.xml
	site/helpers/image/default.php
	site/language/de-DE/de-DE.com_eventgallery.ini
	site/language/en-GB/en-GB.com_eventgallery.ini
	site/media/css/eventgallery.css
	site/media/js/JSGallery2.js
	site/views/event/tmpl/ajaxpaging.php
	site/views/event/tmpl/default.php
	site/views/event/tmpl/imagelist.php
	site/views/resizeimage/view.html.php
	site/views/singleimage/tmpl/default.php
moved social to snippeds, fixed upload controller.
fixed upload
some open issues due to the merge from 2.6.7