[Feature Request] Simplified version of std::shared_ptr and resizable std::vector about corrade HOT 3 CLOSED

There's no plan for a simplified shared_ptr -- the suffering of projects relying heavily on shared pointers is not worth the perceived convenience of these -- based on my experience, it makes reasoning about data ownership very hard and in many projects a lot of time was wasted tracking down issues where the application crashed on exit due to data ownership issues, eating more memory than it should be because a shared pointer was kept for longer than it was optimal, and generally was a indication of a potential design issue. So I decided to not introduce shared pointers in this form into Magnum, except when needed to interact with 3rd party libraries such as DART. If you want to store reference-counted data with Magnum's own APIs, use the ResourceManager -- I'd say that's the Magnum version of shared pointers, but still with a clear ownership rules.

I'm planning to add an opt-in growing functionality to Array, yes. I might need it to implement some parts of mosra/magnum#371, so pretty soon (December?). But it'll be quite different from what you might expect :)

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Keeping open until I have the growable Array done :)

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Initial version of growable arrays done in 3cf41e3. I'll be publishing a post with benchmarks and comparison against other implementations early next year, until then you have to trust me that the implementation is good enough :)

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