package.json :: update moment to 2.3.0 for days('monday')
cmf/mrf.js :: exit early if alias wasn't set
bin/couch-time-cli.js :: added --span (year, month, week day, hour)
cmd/mrf.js :: let user set --span to control moment().start/end

    day, week, month
cmd/mrf.js :: --when overrides TODAY with relative days like monday