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* Added complete list of configuration parameters to documentation.
* `bbox` and `where` queries now apply to `csv` layers.
* `bbox` and `where` queries now apply to `json` layers.
* Added progress bar (of sorts) when downloading files.
* Improved console output.
* Added location of downloaded data to documentation.
* Added Python 3.4 and 3.5 support.
* Remove Python 2.6 support.