update readme
updated day 2 terminology
updated homework for day 2
added homework for day 1
updated terminology and hw day 2
updated day 2
updated day 2
updated day 3 notes
updated day 2 notes
updated html5 notes
added notes for CSS intro on day 3
updated CSS notes
updated CSS notes
updated CSS notes
updated CSS notes
updated CSS notes
updated CSS notes
updated CSS notes
update readme
added homework for day 3