Alter amazon payment module for their new csv format.
Add missing cid after contact creation, fix #207.
Remove contacts page from default config (superceded by members page).
quick fix for github issue 209. https://github.com/elplatt/seltzer/issues/209
Merge pull request #210 from davidbuzz/master

quick fix for github issue 209. https://github.com/elplatt/seltzer/issue...
Change price and voting status defaults to safer values.
Clarify negative account balance wording.
Prevent duplicate transactions and check if name is known, close #215.