Add second assignment
Draft changes to reading schedule
Improve separation of footnotes from body
Merge remote-tracking branch 'refs/remotes/upstream/bk-custom' into 2015-spring
Update syllabus

The reading list has been overhauled to reflect what worked and what
didn't in Fall 2014.  The course description has been punched up too.
The structure of assignments is different for Spring 2015 due to higher
enrollment---doing a final exam instead of a paper.

Also a technical change: the Markdown syllabus is no longer
hard-wrapped.  Of course this messes with tracking; sorry.
Update README

and stop hard-wrapping
Update metadata
Remove old assignments and lecture notes
Change OAK wording
Modify grading scheme
Reduce reading schedule

Main substantive change is in the week on testing rational deterrence
theory; adding the original Huth and Russett article
Merge branch '2015-spring' into gh-pages

Conflicts:
	_assignments/03-final-paper.pdf
Remove second short paper prompt
Rebuild syllabus PDF