use @banner in pages partial and fixed share_helper
use @banner in pages partial and fixed share_helper

We need to use @banner in the page helper because we don't know the
context and @banner gets all that stuff in the controller already.
share_helper used wrong truncate syntax.

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