Added FindTinyXML2.cmake

CMakeModules/FindTinyXML2.cmake

+# with uknowing courtesy: 
+# https://github.com/sainteos/tmxparser/blob/master/cmake/FindTinyXML2.cmake
+
+# Copyright (c) 2014 Andrew Kelley
+# This file is MIT licensed.
+# See http://opensource.org/licenses/MIT
+
+# TINYXML2_FOUND
+# TINYXML2_INCLUDE_DIR
+# TINYXML2_LIBRARIES
+
+find_path(TINYXML2_INCLUDE_DIR NAMES tinyxml2.h)
+find_library(TINYXML2_LIBRARIES NAMES tinyxml2)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(TINYXML2 DEFAULT_MSG TINYXML2_LIBRARIES TINYXML2_INCLUDE_DIR)
+
+mark_as_advanced(TINYXML2_INCLUDE_DIR TINYXML2_LIBRARIES)