move openalias from plugins to core

lib/util.py

@@ -469,22 +469,3 @@ class StoreDict(dict):
             self.save()
 
 
-import bitcoin
-from plugins import run_hook
-
-class Contacts(StoreDict):
-
-    def __init__(self, config):
-        StoreDict.__init__(self, config, 'contacts')
-
-    def resolve(self, k):
-        if bitcoin.is_address(k):
-            return {'address':k, 'type':'address'}
-        if k in self.keys():
-            _type, addr = self[k]
-            if _type == 'address':
-                return {'address':addr, 'type':'contact'}
-        out = run_hook('resolve_address', k)
-        if out:
-            return out
-        raise Exception("Invalid Bitcoin address or alias", k)