Second public release (v0.1.1)

[nickpelling]

This release adds a ring container (like a wrap-around vector, so can be used for queues) and direct composability (containers can directly contain other containers). Stacks and queues have been reworked as container adapters (so they derive from the base set of unordered containers). There have been many internal structural changes, but the external API is essentially unchanged.

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This discussion was created from the release Second public release (v0.1.1).