NAIROBI, Nov 1 (Reuters) - The Kenyan shilling gained on Tuesday as banks sold dollars ahead of a rate-setting meeting and after the IMF said it could release further funds to boost the country's foreign exchange reserves. The International Monetary Fund said late on Monday it has provisionally approved an extra $250 million to top up Kenya's $500 million Extended Credit Facility, meant to boost the country's foreign exchange reserves to help tackle a widening balance of payments gap.   Full Article