Remove RippleAddress:

The RippleAddress class was used to represent a number of fundamentally
different types: account public keys, account secret keys, node public
keys, node secret keys, seeds and generators.

The class is replaced by the following types:
* PublicKey for account and node public keys
* SecretKey for account and node private keys
* Generator for generating secp256k1 accounts
* Seed for account, node and generator seeds

src/ripple/protocol/impl/Sign.cpp

@@ -45,10 +45,9 @@ verify (STObject const& st,
     Serializer ss;
     ss.add32(prefix);
     st.addWithoutSigningFields(ss);
-    return pk.verify(
+    return verify(pk,
         Slice(ss.data(), ss.size()),
-            Slice(sig->data(), sig->size()),
-                true);
+            Slice(sig->data(), sig->size()));
 }
 
 // Questions regarding buildMultiSigningData: