replaced ErrorHelper with FlashMessageHelper
replaced ErrorHelper with FlashMessageHelper

a reminder from the merge.

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