Merge pull request #324 from godsflaw/fix_bannering_again

Fixes for all HTML bannering cases
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 remote-tracking branch 'upstream/master' into fix_bannering_again