Twitter on Tuesday announced a number of changes to tweets, including what will be included in a message's 140-character count. The changes will be rolled out in the coming months. When replying to a tweet, tagged @names at the beginning of the reply no longer will be included in the character count. Photos, GIFs, videos, polls and quote tweets no longer will be counted against the character limit. Tweets that begin with a username will be delivered to all followers of that user, and users will be able to retweet and quote tweet themselves.