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/script.h

@@ -2,19 +2,24 @@
 // 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 H_BITCOIN_SCRIPT
 #define H_BITCOIN_SCRIPT
 
+#include "bignum.h"
+#include "key.h"
+#include "util.h"
+
+#include <stdexcept>
+#include <stdint.h>
 #include <string>
 #include <vector>
 
 #include <boost/foreach.hpp>
 #include <boost/variant.hpp>
 
-#include "keystore.h"
-#include "bignum.h"
-
 class CCoins;
+class CKeyStore;
 class CTransaction;
 
 static const unsigned int MAX_SCRIPT_ELEMENT_SIZE = 520; // bytes
@@ -247,7 +252,7 @@ inline std::string StackString(const std::vector<std::vector<unsigned char> >& v
 class CScript : public std::vector<unsigned char>
 {
 protected:
-    CScript& push_int64(int64 n)
+    CScript& push_int64(int64_t n)
     {
         if (n == -1 || (n >= 1 && n <= 16))
         {
@@ -261,7 +266,7 @@ protected:
         return *this;
     }
 
-    CScript& push_uint64(uint64 n)
+    CScript& push_uint64(uint64_t n)
     {
         if (n >= 1 && n <= 16)
         {
@@ -298,16 +303,16 @@ public:
 
 
     //explicit CScript(char b) is not portable.  Use 'signed char' or 'unsigned char'.
-    explicit CScript(signed char b)    { operator<<(b); }
-    explicit CScript(short b)          { operator<<(b); }
-    explicit CScript(int b)            { operator<<(b); }
-    explicit CScript(long b)           { operator<<(b); }
-    explicit CScript(int64 b)          { operator<<(b); }
-    explicit CScript(unsigned char b)  { operator<<(b); }
-    explicit CScript(unsigned int b)   { operator<<(b); }
-    explicit CScript(unsigned short b) { operator<<(b); }
-    explicit CScript(unsigned long b)  { operator<<(b); }
-    explicit CScript(uint64 b)         { operator<<(b); }
+    explicit CScript(signed char b)        { operator<<(b); }
+    explicit CScript(short b)              { operator<<(b); }
+    explicit CScript(int b)                { operator<<(b); }
+    explicit CScript(long b)               { operator<<(b); }
+    explicit CScript(long long b)          { operator<<(b); }
+    explicit CScript(unsigned char b)      { operator<<(b); }
+    explicit CScript(unsigned int b)       { operator<<(b); }
+    explicit CScript(unsigned short b)     { operator<<(b); }
+    explicit CScript(unsigned long b)      { operator<<(b); }
+    explicit CScript(unsigned long long b) { operator<<(b); }
 
     explicit CScript(opcodetype b)     { operator<<(b); }
     explicit CScript(const uint256& b) { operator<<(b); }
@@ -316,16 +321,16 @@ public:
 
 
     //CScript& operator<<(char b) is not portable.  Use 'signed char' or 'unsigned char'.
-    CScript& operator<<(signed char b)    { return push_int64(b); }
-    CScript& operator<<(short b)          { return push_int64(b); }
-    CScript& operator<<(int b)            { return push_int64(b); }
-    CScript& operator<<(long b)           { return push_int64(b); }
-    CScript& operator<<(int64 b)          { return push_int64(b); }
-    CScript& operator<<(unsigned char b)  { return push_uint64(b); }
-    CScript& operator<<(unsigned int b)   { return push_uint64(b); }
-    CScript& operator<<(unsigned short b) { return push_uint64(b); }
-    CScript& operator<<(unsigned long b)  { return push_uint64(b); }
-    CScript& operator<<(uint64 b)         { return push_uint64(b); }
+    CScript& operator<<(signed char b)        { return push_int64(b); }
+    CScript& operator<<(short b)              { return push_int64(b); }
+    CScript& operator<<(int b)                { return push_int64(b); }
+    CScript& operator<<(long b)               { return push_int64(b); }
+    CScript& operator<<(long long b)          { return push_int64(b); }
+    CScript& operator<<(unsigned char b)      { return push_uint64(b); }
+    CScript& operator<<(unsigned int b)       { return push_uint64(b); }
+    CScript& operator<<(unsigned short b)     { return push_uint64(b); }
+    CScript& operator<<(unsigned long b)      { return push_uint64(b); }
+    CScript& operator<<(unsigned long long b) { return push_uint64(b); }
 
     CScript& operator<<(opcodetype opcode)
     {