update comment length.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
add build script

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
using gulp-mocha to testing.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
update gulp

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
add bower install command.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
Merge pull request #8 from appleboy/build

replace Grunt build with gulp script.