In case you haven't noticed it, the marijuana industry is awash in deal-making. A couple of major deals involving Aurora Cannabis (NASDAQOTH: ACBFF) and Canopy Growth (NASDAQOTH: TWMJF) have attracted headlines. But there have been plenty of smaller deals that have flown beneath the radar screens for many investors.Aurora and Canopy have emerged as the "kings of deals" in the marijuana industry, both in size and volume of acquisitions and partnerships the two medical marijuana growers have made.