improve handling of images in wiki/article RSS feeds re #872
improve handling of images in wiki/article RSS feeds re #872

geoiq/digitalgazette,adammck/crabgrass,adammck/crabgrass,riseuplabs/crabgrass,nilclass/echosocial,nilclass/echosocial,adammck/crabgrass,riseuplabs/crabgrass,riseuplabs/crabgrass,riseuplabs/crabgrass,nilclass/echosocial,geoiq/digitalgazette,ajturner/crisiscommons,ajturner/crisiscommons,geoiq/digitalgazette,riseuplabs/crabgrass,ajturner/crisiscommons,riseuplabs/crabgrass,adammck/crabgrass,riseuplabs/crabgrass,nilclass/echosocial,geoiq/digitalgazette,ajturner/crisiscommons