NEW YORK (Reuters) - Employees at the U.S. liberal grass-roots group ACORN who were caught on video giving tax advice to a couple posing as a pimp and a prostitute have been cleared of criminal wrongdoing, New York prosecutors said on Monday. The organization has been reeling since a YouTube video was disseminated last September showing ACORN workers giving advice on how to flout the law to two conservative activists who posed as a pimp and a prostitute. The U.S. Congress then voted by wide margins to prohibit the federal government from funding ACORN, and the U.S. Census Bureau ended...