Merge pull request #1 from bcaffo/gh-pages

merging
Update announcements/syllabus
Add SWIRL announcement
Merge branch 'master' of github.com:rdpeng/courses

* 'master' of github.com:rdpeng/courses:
  Update announcements/syllabus
fixed date

date should be '2012', not '2014'
Edited the project file. It's still different on Coursera
Added the hunger.csv file
Merge pull request #23 from bcaffo/master

Merging gh-pages and master
Merge branch 'master' of github.com:DataScienceSpecialization/courses

* 'master' of github.com:DataScienceSpecialization/courses:
  Added the hunger.csv file
  Edited the project file. It's still different on Coursera
  updates
  Typo in Lec 01-01-03, Afriad -> Afraid
  updated jeff's lectures
Update R programming announcements/syllabus
Start playing with yhat
Add annual mean pollution example
Deleted a pdf file
Some small edits

Deleted a pdf file, and made some small edits to data products files
pulled latest updates from Github
Added rstudio lecture and some images
some image files in regression
More yhat stuff
Merge branch 'master' of github.com:DataScienceSpecialization/courses into dataprod

* 'master' of github.com:DataScienceSpecialization/courses:
  Added the hunger.csv file
  Edited the project file. It's still different on Coursera
  updates
  Typo in Lec 01-01-03, Afriad -> Afraid
  updated jeff's lectures
  Makefile for creating PDF slides
  Talk about DSS sequence
  Update
  Update week 4 announcement
Merge branch 'dataprod'

* dataprod:
  More yhat stuff
  Add annual mean pollution example
  Start playing with yhat