Update dependency on pandas and numpy in pip package (datacommonsorg#111

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* Update dependency on pandas and numpy in pip package

* Bump version to 1.0.5 to include urllib change

* Update setup.py to version 1.0.5

Changelog and version update for 1.0.2 (datacommonsorg#107)

Stable release of version 1.0.1

Stable release of version 0.4.3

Stable release of version 1.0.0