It looks like 2015 will go down in history as a very active year for mergers and acquisitions. Valuations and deal volume continued to ratchet up last year as the months flew by.Some of you transactional attorneys finally may be getting some rest after a heavy number of hours in December to get one or more M&A deals across the finish line in 2015. No doubt those of us in the Chicago deal community are hoping that 2016 will continue to see a high number of M&A transactions.As possible fuel for sustained deal flow …