quick bug fix to the sql_builder so that it doesn't throw an exception when selecting more than 4 tags
quick bug fix to the sql_builder so that it doesn't throw an exception
when selecting more than 4 tags

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