spamassassin: workaround for issue #444

and...
    use tests from spamd output (if sent)
    set the contents of a header to '' if undefined
spamassassin: restored empty string test (vs false)
spamassassin: remove hack, insert fix

I think.  So far, so good.
note.js: copied in a clean branch
Merge branch 'note_only' of https://github.com/msimerson/Haraka into msimerson-note_only
Re-implementation of result store
Remove some usage of "note"
Merge pull request #463 from godsflaw/godsflaw

return after next() in the whitelist checks
rename s/ResultStore|result_store/Results/g
results: a basket of changes

added 'get', for retrieving notes
added 'incr', for (in|de)crementing counters
replaced 2 forEach with for loops

config: duplicate use of 'config'
err: automatically emits a logerror
move hide & push processing into collate, where used
results: remove incrementer TODO
results: noted automatic err logging
results: documented get,incr features, added debug option
added more detailed docs for results.ini options
rename Class from Results to ResultStore
docs: add results pointers to docs/Results.md

in Connection.md and Transaction.md
fixed geoip doc example, removed definedness test
results: added push option
Prevent plugins adding empty headers
Merge pull request #464 from smfreegard/master

Prevent plugins adding empty headers