Remove unnecessary dependencies for bitcoin-cli

This commit removes all the unnecessary dependencies (key, core,
netbase, sync, ...) from bitcoin-cli.

To do this it shards the chain parameters into BaseParams, which
contains just the RPC port and data directory (as used by utils and
bitcoin-cli) and Params, with the rest.

src/chainparamsbase.cpp

@@ -0,0 +1,93 @@
+// Copyright (c) 2010 Satoshi Nakamoto
+// Copyright (c) 2009-2014 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "chainparamsbase.h"
+
+#include "assert.h"
+#include "util.h"
+
+#include <boost/assign/list_of.hpp>
+
+using namespace boost::assign;
+
+//
+// Main network
+//
+
+class CBaseMainParams : public CBaseChainParams {
+public:
+    CBaseMainParams() {
+        networkID = CBaseChainParams::MAIN;
+        nRPCPort = 8332;
+    }
+};
+static CBaseMainParams mainParams;
+
+//
+// Testnet (v3)
+//
+class CBaseTestNetParams : public CBaseMainParams {
+public:
+    CBaseTestNetParams() {
+        networkID = CBaseChainParams::TESTNET;
+        nRPCPort = 18332;
+        strDataDir = "testnet3";
+    }
+};
+static CBaseTestNetParams testNetParams;
+
+//
+// Regression test
+//
+class CBaseRegTestParams : public CBaseTestNetParams {
+public:
+    CBaseRegTestParams() {
+        networkID = CBaseChainParams::REGTEST;
+        strDataDir = "regtest";
+    }
+};
+static CBaseRegTestParams regTestParams;
+
+static CBaseChainParams *pCurrentBaseParams = 0;
+
+const CBaseChainParams &BaseParams() {
+    assert(pCurrentBaseParams);
+    return *pCurrentBaseParams;
+}
+
+void SelectBaseParams(CBaseChainParams::Network network) {
+    switch (network) {
+        case CBaseChainParams::MAIN:
+            pCurrentBaseParams = &mainParams;
+            break;
+        case CBaseChainParams::TESTNET:
+            pCurrentBaseParams = &testNetParams;
+            break;
+        case CBaseChainParams::REGTEST:
+            pCurrentBaseParams = &regTestParams;
+            break;
+        default:
+            assert(false && "Unimplemented network");
+            return;
+    }
+}
+
+bool SelectBaseParamsFromCommandLine() {
+    bool fRegTest = GetBoolArg("-regtest", false);
+    bool fTestNet = GetBoolArg("-testnet", false);
+
+    if (fTestNet && fRegTest) {
+        return false;
+    }
+
+    if (fRegTest) {
+        SelectBaseParams(CBaseChainParams::REGTEST);
+    } else if (fTestNet) {
+        SelectBaseParams(CBaseChainParams::TESTNET);
+    } else {
+        SelectBaseParams(CBaseChainParams::MAIN);
+    }
+    return true;
+}