Merge pull request #4 from Tiger0915/gh-pages

Day 2 exercises, update homepage with correct info
Fufilled requirements for home page. Content not finished
updated class landing page with day 3 topics
wrote the section about objects
quick edits to the objects section
finished DOM overview section
three items in DOM API section
getting and setting attributes
everything written through animation
events and slideshow assignment
text edit
Insert Day 4 Exercise