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/STObject.cpp

@@ -657,6 +657,12 @@ void STObject::setFieldVL (SField const& field, Blob const& v)
     setFieldUsingSetValue <STBlob> (field, Buffer(v.data (), v.size ()));
 }
 
+void STObject::setFieldVL (SField const& field, Slice const& s)
+{
+    setFieldUsingSetValue <STBlob>
+            (field, Buffer(s.data(), s.size()));
+}
+
 void STObject::setFieldAmount (SField const& field, STAmount const& v)
 {
     setFieldUsingAssignment (field, v);