mailhelp-overwrite-subhelp
Merge pull request #2 from coolme200/fix-mailhelp-overwrite-subhelp

locals should overwrite helpers
Release 0.2.1
use blanket instead of jscover; update moment deps.
Release 0.2.2
options.scope not support on ejs@0.8.4+
Release 0.3.0
fixed test cases fail on node 0.11+
support coveralls
check exists content-type first
Release 0.3.1