* slt-release: don't add npmignore entries twice (Miroslav Bajtoš)
 * Update URLs in CONTRIBUTING.md (#68) (Ryan Graham)
 * Add 'use strict' to modules (Kevin Delisle)
 * doc: add 'slt copyright' description (Ryan Graham)
 * doc: remove github installation (Ryan Graham)
 * slt: add shrinkwrap command to help listing (Ryan Graham)
 * slt-release: document npm-shrinkwrap.json handling (Ryan Graham)
 * slt: fix silent shrinkwrap failures (Ryan Graham)
 * slt: handle CLIs that return Promises (Ryan Graham)
 * slt: remove duplicate shrinkwrap message (Ryan Graham)