Added tweepy to required python packages
Upgraded to builtin facebook like button.  Part of issue #17
Updated paper sharing widget to refer to doi link of paper.  Part of issue #17
Updated data-url in tweet link to use DOI.  Closes issue #17
Created new app named projects as part of issue #33
Wrote unit tests for projects app.  Part of issue #33
Added projects app to settings file.  Part of issue #33
Updated installation instructions for correct south usage.
Added a Project model.  Part of issue #33
Created templates for projects app.  Part of issue #33
Wrote views for projects app.  Part of issue #33
Hooked projects app into urlconf.  Part of issue #33
Fixed some typos in tests.  Part of issue #33
Wrote an statement of the current and planned functionality of the projects app.
Added blocks to display personnel and publications on project-detail pages.  Part of issue #33
Made display of personnel and publications conditional on having linked items.  Part of issue #33
Included project app in the sitemap file.  Part of issue #33
Added projects rss feed.  Part of issue #33
Extended API to include Projects.  Part of issue #33
Fixed typo in project api