v1.5.1

pod_vector

• Support for _expand if available
• Support for alignment of T (previously the allocator was assumed to provide aligned memory)

Breaking: Due to the changes above the allocator interface was changed significantly and is not compatible with the previous one

Other

• flat_set: support for transparent lookups (somewhat similar to the ones introduced for std::set in C++14)
• poly_span: disabled warning for function cast