For tomorrow (and for differential equations!)

So by rushing Bernoulli's differential equation, we got done with diff.eq.'s today. Tomorrow, we'll cover double and multiple integrals. 

• Lecture schedule updated with book references.
• Brief preview note uploaded
• Also, upon request: a note on linear diff.eq. (systems) and stability.

The update in the lecture schedule might cause changes to the problems drafted, but I will be hesitant to add much (if anything) for the upcoming seminar.