0.1.19

Changelog

a79aead 'time' can now be a UNIX integer or float
aa7e9e1 Merge pull request #15 from diag/upstream-pr
46b521a Merge pull request #16 from aybabtme/fix-travis
c00b868 make dir if possible
5f4bfb8 changing module for PR
be6fda4 better support for numeric timestamps
8ae8b64 add Apache 2 license

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