Revert "do a SSL lookup against crossref.org"

This reverts commit 7a613ccc11611cccf88b03444314c4c78ea0ae50.

data.crossref.org doesn't talk SSL.  *yay*
every CS problem can be solved with one more level of indirection.

added a proxy for data.crossref.org so that SSL doesn't break

added a test stub since i'm tired error prone right now