Fix Issues #1 and #2: support mrt, settings, acceptance tests

Changes:
  * support Meteorite
  * support Meteor.settings '--settings'
  * export NODE_PATH so acceptance tests run
    (fixes selenium-webdriver MODULE_NOT_FOUND error)
  * add Meteor.methods stub
  * Karma.conf.js - load `app/lib` before `app` js files to emulate Meteor loading order