Updated lecture notes.
Fixed a few typos and added new slides on microarrays
Ignore new md/html files.
Delete Biology_basics.md
Fixed the room number for Thursdays.
Added dates for the final presentations.
Update README.md
Added link to new slides
Merge pull request #1 from RGLab/master

Added link to new slides
Update some presentations and added new ones.
Merge commit '0e02ac7999bb59d2102931815d67aff9b8ba8240'