Remove the global include to iostream; this reduces the compile time by 10%

( http://herbsutter.com/2013/08/19/gotw-7a-solution-minimizing-compile-time-dependencies-part-1/  for inspiration)

arangod/Aql/ExecutionNode.cpp

@@ -25,6 +25,8 @@
 /// @author Copyright 2014, triagens GmbH, Cologne, Germany
 ////////////////////////////////////////////////////////////////////////////////
 
+#include <iostream>
+
 #include "Aql/ExecutionNode.h"
 #include "Aql/Collection.h"
 #include "Aql/ExecutionPlan.h"

arangod/Aql/ExecutionPlan.cpp

@@ -27,6 +27,8 @@
 /// @author Copyright 2012-2013, triAGENS GmbH, Cologne, Germany
 ////////////////////////////////////////////////////////////////////////////////
 
+#include <iostream>
+
 #include "Aql/ExecutionPlan.h"
 #include "Aql/AggregationOptions.h"
 #include "Aql/Ast.h"

arangod/RestServer/ArangoServer.cpp

@@ -30,6 +30,7 @@
 #include "ArangoServer.h"
 
 #include <v8.h>
+#include <iostream>
 
 #include "Actions/RestActionHandler.h"
 #include "Actions/actions.h"

arangod/RestServer/ConsoleThread.cpp

@@ -27,6 +27,8 @@
 /// @author Copyright 2009-2013, triAGENS GmbH, Cologne, Germany
 ////////////////////////////////////////////////////////////////////////////////
 
+#include <iostream>
+
 #include "ConsoleThread.h"
 
 #include "ApplicationServer/ApplicationServer.h"

arangod/RestServer/arangod.cpp

@@ -27,6 +27,8 @@
 /// @author Copyright 2010-2013, triAGENS GmbH, Cologne, Germany
 ////////////////////////////////////////////////////////////////////////////////
 
+#include <iostream>
+
 #include "Basics/Common.h"
 
 #include "Basics/messages.h"

arangod/V8Server/v8-vocbase.cpp

@@ -27,6 +27,8 @@
 /// @author Copyright 2011-2013, triAGENS GmbH, Cologne, Germany
 ////////////////////////////////////////////////////////////////////////////////
 
+#include <iostream>
+
 #include "v8-vocbaseprivate.h"
 #include "Aql/Query.h"
 #include "Aql/QueryList.h"

arangosh/ArangoShell/ArangoClient.cpp

@@ -27,6 +27,7 @@
 /// @author Copyright 2012-2013, triAGENS GmbH, Cologne, Germany
 ////////////////////////////////////////////////////////////////////////////////
 
+#include <iostream>
 #include "ArangoClient.h"
 
 #include "Basics/files.h"

arangosh/Benchmark/arangob.cpp

@@ -28,6 +28,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "Basics/Common.h"
+#include <iostream>
 
 #include "ArangoShell/ArangoClient.h"
 #include "Basics/Mutex.h"

arangosh/V8Client/arangodump.cpp

@@ -28,6 +28,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "Basics/Common.h"
+#include <iostream>
 
 #include "ArangoShell/ArangoClient.h"
 #include "Basics/FileUtils.h"

arangosh/V8Client/arangoimp.cpp

@@ -28,6 +28,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "Basics/Common.h"
+#include <iostream>
 
 #include "ArangoShell/ArangoClient.h"
 #include "Basics/FileUtils.h"

arangosh/V8Client/arangorestore.cpp

@@ -28,6 +28,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "Basics/Common.h"
+#include <iostream>
 
 #include "ArangoShell/ArangoClient.h"
 #include "Basics/FileUtils.h"

arangosh/V8Client/arangosh.cpp

@@ -28,6 +28,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "Basics/Common.h"
+#include <iostream>
 
 #include <v8.h>
 #include <libplatform/libplatform.h>

lib/ApplicationServer/ApplicationServer.cpp

@@ -37,6 +37,7 @@
 #include <pwd.h>
 #include <grp.h>
 #endif
+#include <iostream>
 
 #include "ApplicationServer/ApplicationFeature.h"
 #include "Basics/ConditionLocker.h"

lib/Basics/Common.h

@@ -131,7 +131,6 @@ typedef long suseconds_t;
 
 #include <algorithm>
 #include <deque>
-#include <iostream>
 #include <list>
 #include <map>
 #include <queue>

lib/Scheduler/ApplicationScheduler.cpp

@@ -30,6 +30,7 @@
 #ifdef _WIN32
 #include "Basics/win-utils.h"
 #endif
+#include <iostream>
 
 #include "ApplicationScheduler.h"
 

lib/V8/v8-utils.cpp

@@ -35,6 +35,7 @@
 #include "v8-buffer.h"
 
 #include <regex.h>
+#include <iostream>
 
 #include "Basics/Dictionary.h"
 #include "Basics/FileUtils.h"