Make CRM_Core_Error::fatal throw an exception when called from the API

Error handling should be passed back to the api rather than give an error.

CRM_Core_Error::fatal hits this line

if ( php_sapi_name() == "cli" )

{ print ("Sorry. A non-recoverable error has occurred.\n$message \n$code\n$email\n\n"); debug_print_backtrace(); die ("\n"); }

Not sure why you would ever want that but for API handling through api is better