Alias json_string to to_json
Merge pull request #1 from eddiezane/to_json

Thanks!
It should be to_json.
Version bump 0.0.3
use to_json instead of json_string
Update README.md

Fix header to match method name
Merge pull request #2 from patricklewis/patch-1

Update README.md
Add send_all, send_each_at
Add send_all, send_each_at
remove about scheduled send
Add scheduling params
Bump version 0.0.5
Add about scheduling parameters to README
change scheduled parameter to int
Add add_to array support