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/bloom.h

@@ -1,16 +1,17 @@
 // Copyright (c) 2012 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_BLOOM_H
 #define BITCOIN_BLOOM_H
 
-#include <vector>
-
-#include "uint256.h"
 #include "serialize.h"
 
+#include <vector>
+
 class COutPoint;
 class CTransaction;
+class uint256;
 
 // 20,000 items with fp rate < 0.1% or 10,000 items and <0.0001%
 static const unsigned int MAX_BLOOM_FILTER_SIZE = 36000; // bytes