remove deprecated gems 'jekyll-page-hooks' and 'jekyll-date-format'
Merge pull request #1622 from raysrashmi/ry-updating-gems

remove deprecated gems 'jekyll-page-hooks' and 'jekyll-date-format'
Fix inadvertent mistake of attributing authorship to Philip Wadler instead of Simeon Peyton Jones!
Provide link to Pittsburgh TechFest 2014 post
Merge branch 'master' of git://github.com/imathis/octopress

* 'master' of git://github.com/imathis/octopress:
  remove deprecated gems 'jekyll-page-hooks' and 'jekyll-date-format'