v0.2.1 

Merge pull request 4n4nd#60 from 4n4nd/release-v0.2 Update Version number to create a new release Reviewed-by: https://github.com/thoth-zuul[bot]

Merge pull request 4n4nd#39 from abyrne55/v0.0.2 Remove matplotlib warning

Merge pull request 4n4nd#22 from 4n4nd/v0.0.2 Add properties `start_time` and `end_time` (datetime objects)

Merge pull request 4n4nd#17 from 4n4nd/v0.0.2 Update version number for v0.0.2b1 release