Added learning objectives for lower GI and Liver/GB/Pancreas

I just added learning objectives to both of these lectures, and re-uploaded the ppts and pdfs. Sorry about that! I’ll be posting more soon but I know you guys have been waiting for these so I wanted to let you know now. There is a TON of stuff in the Liver/GB/Pancreas lecture – and rather than writing skimpy objectives that leave out important stuff, I decided to err on the side of too many LOs.