post link to sagemath cloud website
modernize some worksheets
Wrote lecture 13 on continued fractions.
update lecture 13 based on class.
add to the faq
update faq
write lecture 14 -- rational reconstruction -- for May 1, 2013.
add a plan.
added link to homework 5 google doc form.
info about histogram
update lecture based on class
add link to lecture 14 video
fix link error (reported by Rebecca Hoberg)
write lectuer 15
update lecture based on class
link to live recording
working on lecture 16
finished lecture 16 on crypto....
update based on lecture 16 happening.
Adding the quarter.