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.

AccountState.h

@@ -0,0 +1,16 @@
+#ifndef __ACCOUNTSTATE__
+#define __ACCOUNTSTATE__
+
+// An account's state in one or more accepted ledgers
+
+class AccountState
+{
+private:
+    int160 mAccountID;
+    uint64 mBalance;
+    uint32 mAccountSeq, mFirstValidLedger, mLastValidLedger;
+
+public:
+};
+
+#endif