added switched-on state to filters
Merge branch 'master' of git://git.mysociety.org/pombola into final-polish
added photos to the house organisation pages
reduced vertical height of carousel on homepage, #1004
Merge branch 'master' of git://git.mysociety.org/pombola into final-polish
Change house image based on current org slug

This adds the organisation slug as a class name on the .house-splash
div, which is then styled in the CSS to have the correct background
image.
Merge branch 'master' into final-polish