Fixing several windows issues.

radixmath/CMakeLists.txt

 TRIBITS_SUBPACKAGE(math)
 
+# avoid windows use of MIN/MAX macros
+IF("${CMAKE_SYSTEM_NAME}" STREQUAL "Windows")
+   MESSAGE(STATUS "Applying -DNOMINMAX")
+   ADD_DEFINITIONS(-DNOMINMAX)
+ENDIF()
 
 SET(SOURCE
 matrix.cc

radixmath/util.cc

@@ -8,6 +8,7 @@
 #include "radixmath/util.hh"
 #include "radixmath/point3d.hh"
 #include "radixmath/vector3d.hh"
+#include <algorithm>
 #include <cstddef>
 
 namespace radix