Cleanup code using forward declarations.

Use misc methods of avoiding unnecesary header includes.
Replace int typedefs with int##_t from stdint.h.
Replace PRI64[xdu] with PRI[xdu]64 from inttypes.h.
Normalize QT_VERSION ifs where possible.
Resolve some indirect dependencies as direct ones.
Remove extern declarations from .cpp files.

src/keystore.h

@@ -2,11 +2,13 @@
 // Copyright (c) 2009-2013 The Bitcoin developers
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #ifndef BITCOIN_KEYSTORE_H
 #define BITCOIN_KEYSTORE_H
 
-#include "crypter.h"
+#include "key.h"
 #include "sync.h"
+
 #include <boost/signals2/signal.hpp>
 
 class CScript;
@@ -88,8 +90,10 @@ public:
     virtual bool GetCScript(const CScriptID &hash, CScript& redeemScriptOut) const;
 };
 
+typedef std::vector<unsigned char, secure_allocator<unsigned char> > CKeyingMaterial;
 typedef std::map<CKeyID, std::pair<CPubKey, std::vector<unsigned char> > > CryptedKeyMap;
 
+
 /** Keystore which keeps the private keys encrypted.
  * It derives from the basic key store, which is used if no encryption is active.
  */