Merge pull request #1 from jtleek/gh-pages

Update fork
completed 6.5 (added rCharts version)

also minor edits
chapter 4 updated
chapter 3 updated
gh-pages updated
chapter 3 updated
chapter 3 updated
Create Chapter2.Rmd
Merge pull request #24 from RMDK/gh-pages

Chapter 6 added fig 6.4 & 6.5
Merge pull request #26 from pachamaltese/gh-pages

chapter 3 updated - 7/23/2014
Merge pull request #28 from econaut/gh-pages

Chapter2
Merge remote-tracking branch 'origin/gh-pages'