remove redundant pages link from left menu
new business rules for adding subpages
Introduce distinct resize operations min, max, fill, width, height
shoehorn in an optional extra stage on image chooser to specify an image format
rename verdantimages 'format' model to 'filter'
complete 'select format' interface for images in rich text, passing back a format name that's translated into class/filterspec at render time
Add a stylesheet for rich text elements in the admin backend, so that a) image appearance can be dictated by their format attribute; b) floated images don't go crazy over the whole interface
Merge branch 'master' of github.com:torchbox/verdant-rca
Merge branch 'resizemodes'