NEW YORK, Jan 18 (Reuters) - Time Inc., the top U.S. magazine publisher, will cut 289 jobs from its estimated 11,300 workforce to slash costs as it invests more heavily in Internet properties, the company said on Thursday. The Time Warner Inc. (TWX.N: Quote, Profile, Research) division, which owns properties including Time and People magazines, will cut 117 business jobs and 172 editorial jobs, a...