* Increased heartbeat timer

* Tried to fix bug where wrong node was being reported as being
announced to
* Refactored core somewhat
- Removed data dir encryption (TODO: just encrypt pub/priv key pair)
- Removed simplecrypt dependency

onionr/static-data/default_config.json

@@ -2,8 +2,8 @@
     "general" : {
         "dev_mode": true,
         "display_header" : true,
-        "minimum_block_pow": 6,
-        "minimum_send_pow": 6,
+        "minimum_block_pow": 5,
+        "minimum_send_pow": 5,
 
         "direct_connect" : {
             "respond" : true,