Added day1 slides.
Added day2 and day3 slides.

Day 2 slides are mostly complete, including added slides for function overloading and prototyping.

Day 3 slides are not complete, and only have typedef, enum, and the beginnings of some array slides.
Finished Day 1 slides. Added case statements to Day 2 slides and a couple small edits.
Updated Day2 to include assignment/project info.
Completed day 3 slides.
Merge branch 'develop' of github.com:foogered/reu-programming-course into develop
Merged development branch.