Fixing up quoted printable

Fixed up the quoted printable code so it conformed to old tests.
Next step is to review this code, then try to make the encode_qp()
function blow up under load.
Merge pull request #327 from godsflaw/quoted_printable_changes

Fixing up quoted printable
Just run one test.
Merge pull request #328 from godsflaw/quoted_printable_changes

Just run one test.
Try to speed up QP line splitting
Merge branch 'master' into fix_bannering_again
Merge branch 'fix_bannering_again' of github.com:baudehlo/Haraka into fix_bannering_again