Karma

added DSL for karma awards (per @baudehlo chat),  .ini config can have things like, "if length gt 2" or "if equals 5" or "if match yes". see karma.ini for details.

use exports syntax and avoid having to pass plugin refs around
added hook_rcpt_ok, so karma get called after another RCPT plugin return OK (makes the rcpt limits work better)

Depends on note.js