Feature Request: Message Pricing api to show data for the MMS costs.

[sushan531]

Currently the below api only shows the sms pricing, I tried to get MMS pricing but could not get any.

curl -G https://pricing.twilio.com/v1/Messaging/Countries/US \ -u '[YOUR ACCOUNT SID]:[YOUR AUTH TOKEN]'

It would really be nice to be able to get prices for MMS supported regions/countries.