message: don't use std::is_pod which is soon to be deprecated
  fixes
diff: @@ -31,7 +31,7 @@ class BinaryTreeArray {
  // Simple fixed capacity stack
  template<typename TYPE, size_t CAPACITY,
  - typename = typename std::enable_if<std::is_pod<TYPE>::value>::type>
  + typename = typename std::enable_if<std::is_trivial<TYPE>::value>::type>
  class stack {
  TYPE mElements[CAPACITY];
  size_t mSize = 0;
  