Add SMS-provider spesific exception handlers

[kengu]

To prevent and handle known errors, like Nexmo which reports "15: Illegal sender address" when sending SMS to recipients in the United States with a sender id violating the limited numeric sender only policy of US and Canada carriers. The solution is to use a a pre-approved virtual long number which you can purchase on the Nexmo site. In this case, the exception handler should do two things

Check (exceptions before sending sms)

1. Check if recipient address a home base (country) which requires a private number
2. It it does, check if a private number is associated with the account and replace default sender id with it
3. If it does, and no private number was found, notify user BEFORE sending the SMS

Handle (errors after sending sms)

1. Check if an exception handle exist for given error context
2. If it does, run exception handler

Implementation
These steps should be implemented using interfaces, for example

interface RescueMe\SMS\Check {
        /**
         * @param string $country Country code (ISO2)
         * @param string $number Local number
         * @param array $params Parameters to service
         * @return boolean|array True if allowed, adapted parameters otherwise.
         */
        public function recipient($country, $number);
}

interface RescueMe\SMS\Handle {
        /**
         * @param string $country Country code (ISO2)
         * @param string $number Local number
         * @param array $params Parameters used to invoke service
         */
        public function error($error, $message, $params);
}

Important: Exception resolutions should be configurable from the SMS provider setup page.