Fix Windows build

Fixed windef.h shadowing of 'max' definition and added LEAN_AND_MEAN
definition for more lightweight build.
Added missing 'functional' includes.

CMakeLists.txt

@@ -36,4 +36,8 @@ if(BUILD_TUTORIALS)
 endif()
 
 set(AMQP-CPP_INCLUDE_PATH ${CMAKE_CURRENT_SOURCE_DIR})
-set(AMQP-CPP_INCLUDE_PATH ${CMAKE_CURRENT_SOURCE_DIR} PARENT_SCOPE)
+set(AMQP-CPP_INCLUDE_PATH ${CMAKE_CURRENT_SOURCE_DIR} PARENT_SCOPE)
+
+if (WIN32)
+    add_definitions(-DNOMINMAX -DWIN32_LEAN_AND_MEAN)
+endif()

amqpcpp.h

@@ -22,6 +22,7 @@
 #include <stdexcept>
 #include <utility>
 #include <iostream>
+#include <functional>
 
 // base C include files
 #include <stdint.h>

src/includes.h

@@ -21,6 +21,7 @@
 #include <unordered_map>
 #include <vector>
 #include <queue>
+#include <functional>
 
 // forward declarations
 #include "../include/classes.h"