v0.4.1: Release 0.4.1.

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v0.4.0: Release 0.4.0.

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v0.3.0: Add simple logic variable type, .gitignore, and unit tests.

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v0.2.1: Create a better directory structure.

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v0.2.0: Add simple variable representation and example.

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v0.1.0: Add description and Nimble packaging information.

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