GLOBAL MARKETS-World shares gain, dollar slips after Obama win

* World shares gain after Obama win, European shares up 0.3 pct * U.S. stock futures point to higher open on Wall Street * Euro up 0.2 pct as dollar falls against most major currencies * Gold and oil gain By Marc Jones and Richard Hubbard LONDON, Nov 7 (Reuters) - World shares and gold rallied while the dollar fell on Wednesday after President Barack Obama was re-elected for a second term, signalling no dramatic shift in U.S. economic policy. Gains in Europe's main stock