Get tools working to build initial 3.6.1esr snapshot

* fix up order and details of steps in README
* add versions of each plugin for 3.6.1 to config.json
* add statusbar plugin to config.json
* add handling for cordova-blackberry-plugins to corimf-cron
* add idempotent tagging to corimf-newver so it can be called multiple times
* fix bug in corimf-newver where the local repo didn't know about the new branch (add git fetch)
* add handling of independent tools versions to corimf-newver
* add statusbar plugin to corimf-settings.sample
* in corimf-snapshot switch from "coho create-archive" to "git archive"
* allow for new repos without PREV_TAG in corimf-snapshot