Move internal miner/block creation to separate miner.cpp module.

Public functions referenced elsewhere are added to miner.h.

src/miner.h

@@ -0,0 +1,24 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2012 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_MINER_H
+#define BITCOIN_MINER_H
+
+#include "core.h"
+#include "wallet.h"
+
+/** Run the miner threads */
+void GenerateBitcoins(bool fGenerate, CWallet* pwallet);
+/** Generate a new block, without valid proof-of-work */
+CBlockTemplate* CreateNewBlock(CReserveKey& reservekey);
+/** Modify the extranonce in a block */
+void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce);
+/** Do mining precalculation */
+void FormatHashBuffers(CBlock* pblock, char* pmidstate, char* pdata, char* phash1);
+/** Check mined block */
+bool CheckWork(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey);
+/** Base sha256 mining transform */
+void SHA256Transform(void* pstate, void* pinput, const void* pinit);
+
+#endif // BITCOIN_MINER_H