namshi/winston-graylog2 — pull request #21 by faizanahemad (2014-11-09 20:19:32+00:00)
Title: Added support for custom level mapping.

User can provide a levelMap object in options object passed to the contructor(exported as Graylog2). This will be used to map winston levels to graylog2 levels, instead of the default mapper. If a level has no mapping then it will be mapped to level 'info' (same as before).