move tinyxml2 to internal path

CMakeLists.txt

@@ -55,9 +55,9 @@ include_directories (${OPENSSL_INCLUDE_DIR})
 
 if (USE_INTERNAL_TINYXML)
   message("-- Using local TinyXML2 copy")
-  add_subdirectory(tinyxml2-3.0.0)
-  include_directories(${CMAKE_SOURCE_DIR}/tinyxml2-3.0.0)
-  link_directories(${CMAKE_BINARY_DIR}/tinyxml2-3.0.0)
+  add_subdirectory(internal/tinyxml2-3.0.0)
+  include_directories(${CMAKE_SOURCE_DIR}/internal/tinyxml2-3.0.0)
+  link_directories(${CMAKE_BINARY_DIR}/internal/tinyxml2-3.0.0)
   set(TINYXML_LIBRARIES tinyxml2)
 else ()
   find_package (TinyXML REQUIRED)