spamassassin: 13 new tests. Moved config loading

into register() with callback

remaining changes are to improve testability
Merge pull request #667 from msimerson/spamassassin

spamassassin: 13 new tests. Moved config loading
added outbound.ini
outbound.js: added per-recipient routes
outbound: added lots of ; for jshint's pleasure
outbound: add docs for outbound.ini and always_split