initial effort for publication plans. I'm not sure what to include here, but this at least gets us started.
updated for ICPE and added Physics Education journal. We should probably down-select from this initial list.
Merge pull request #23 from rachelslaybaugh/master

initial effort for publication plans.
Merge pull request #24 from gvwilson/master

Filling in bibliography and assessment
More cleanup in biblography; more publication possibilities