Update 3.md

- improving description.
- fixing typo.
Merge pull request #56 from kr15to/patch-13

Update 3.md
edits
transparency and resizing
initial commit
Merge branch 'master' of github.com:chukong/programmers-guide
typos
added HTML5 and build products
Update 5.md

fixing typo
continued edits
Merge pull request #57 from kr15to/patch-14

Update 5.md
inital commit
continued edits
initial commit
initial commit
initial commit
changed line endings and encoding to UTF8
fix urls
Refactor how ch 9 organized
re org the chapter sort things by usefulness