Transaction Infrastructure Work:

Raw account class (address + public key)
Account State class (account + balance + ledgers valid)
Raw Hanko class
Low-level tranasaction class
Small wallet and key bits
Misc updates to the protocol.
Protocol addition to allow code to wait for replies, but that may not be a good idea.

Account.h

@@ -0,0 +1,17 @@
+#ifndef __ACCOUNT__
+#define __ACCOUNT__
+
+class Account
+{
+private:
+    uint160 mAddress;
+    CKey pubKey;
+
+public:
+
+  bool CheckSignRaw(const std::vector<unsigned char> &toSign,
+    const std::vector<unsigned char> &signature) const;
+  const uint160& GetAddress(void) const { return mAddress; }
+};
+
+#endif