add test_send
modify forecast method

forecast returns nil, if dateLabel is not included in forecasts.
modify CLI

don't print weather if the day doesn't exist.
v0.3.7
Merge branch 'work'
don't support ruby1.9.2
Merge branch 'work'
replace opt parse with slop
Merge branch 'slop'
modify travis.yml

add ruby 2.1.0, 2.1.1, and rbx (rbx-19mode is no longer supported)
exit when option was given