Merge branch 'master' of github.com:DataScienceSpecialization/courses

* 'master' of github.com:DataScienceSpecialization/courses:
  update
  nojekyll
  update ghpages
  update
  renamed prediction course
  update
Merge branch 'master' of github.com:DataScienceSpecialization/courses

* 'master' of github.com:DataScienceSpecialization/courses:
  Added some shiny stuff
  Fix graphs in colors lecture
  Re-export PDF slides
  Re-export PDF slides
  Copy with new name
  Re-export PDF slides
  update
  Added a second shiny lecture
  Added a second shiny lecture and some example apps
  Small changes to the slidify lecture
  Finished rCharts and added rgl and rMaps
  some image files in regression
  Added rstudio lecture and some images
  Some small edits
  Deleted a pdf file
  fixed date
Added hw3
Added a fourth hw
fix homework 1 question 1, which basically was missing a negative sign
fixed homework 1 question 1 - another problem
fix homework 2 slide 8 typo.  lower.tail=TRUE changed to FALSE
fix homework 2 slide 12 question - typo with parens and s/100/10
Merge branch 'master' of https://github.com/bcaffo/courses into inference
Merge pull request #4 from TroyOfHelen/master

fix homework 1 question 1, minus sign and concept
test
Fixed the lecture image stuff
Tried to fix the pdf conversion
completing the merge
hw4 added
Fixing the pdf issues
Converting pdfs
Still figuring out the pdf thing
Think that I have it figured out
Converting more pdfs