Codechange: replace auto_array with std::vector

[PeterN]

auto_array is a strange contraption to handle dynamically-sized arrays.

• It does not allocate the array itself, that's manually created with new[] externally, and then passed in via an implicit constructor.
• It does deallocate the array with delete[] in its destructor.
• Sometimes it's inherited, sometimes it's a member variable.

Replace all uses with std::vector instead.

The code using this looks pretty fragile, so access to the vector elements is via the at() method, instead of array indexer.

Touched code has been auto-formatted for readibility...

[rubidium42]

Have you noticed that MSVC is complaining quite a bit about size_t vs uint?

[PeterN]

Have you noticed that MSVC is complaining quite a bit about size_t vs uint?

Not any more.