- BUGFIX: [3](https://github.com/mozman/steputils/pull/3) multiline string support
0.1a5
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- EXPRESS parser implemented with antlr4
0.1a2
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- optimized STEP-file loader and serializer, speed gain about 7x - renamed module ``stepfile`` into ``p21`` and implemented factory functions at module level
0.1a1
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- pre-alpha state - STEP-file loader and serializer works