Add initial work for SS3.1 support
Merge branch 'SS-3.0.x'
Add requirement for sortablefile module and add drag and drop re-ordering
Add image sorting to templates
Replace coffescripter gallery with flexslider based responsive gallery
Update gallery config to work with default SS config
Add sidebar support to gallery page template
Update gallery controller so that it returns an empty string if no images are present
Reverse merge from master to allow for SS3.0 support