get and send messages impl

tests/getMessages.php

@@ -14,7 +14,8 @@ $mc = Meshcore::getInstance();
 
 $mc->appStart("get_messages");
 
-$resp = $mc->getNextMessage();
+while(true) {
+    $msgs = $mc->pollForMessage('');
 
-print_r($resp);
-exit;
+    if( !empty($msgs) ) print_r($msgs);
+}