CS 241: added March 25, 2013 lecture.
MATH 239: added March 25, 2013 lecture.
MATH 239: fixed mismatched parentheses.
CS 241: sub -> sw typo in one code snippet (thanks Kevin).
PSYCH 207: added March 26, 2013 lecture.
CS 240: added March 26, 2013 lecture.
CS 241: added March 27, 2013 lecture.
MATH 239: added March 27, 2013 lecture.
PSYCH 207: added March 28, 2013 lecture.
CS 240: added March 28, 2013 lecture.
CS 241: $1 -> $4 (fixes #19) and re-indented another code segment.
MATH 239: added April 1, 2013 lecture.
PSYCH 207: added April 2, 2013 lecture.
CS 240: added April 2, 2013 lecture.
CS 241: added April 3, 2013 lecture.
MATH 239: added April 3, 2013 lecture.
PSYCH 207: minor rewording of a few points.
CS 241: clarified factor -> ID per Piazza post #568.
CS 241: added April 5, 2013 lecture.
CS 241: fixed "minimum" to "maximum" from Friday (thanks Cormack).