Datarobot-batch-scoring

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* improve url parsing. You no longer need to include "/api" in the host argument.

* return more descriptive error messages when there is a problem

* include the version of the batch-scoring script in the user-agent header

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* add option to define document encoding

* add option to skip csv dialect detection.

* make adjustment to sample size used by dialect and encoding detection

* use auto_sample as default unless "--n_samples" is defined

* allow "tab" command line arg keyword. e.g. "--delimiter=tab"

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* minor performance improvement for nix users

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* This release is compatible with Windows

* logs are now sent to two files within the directory where the script is run

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* added --auto_sample option to find the n_samples automatically.

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* added --auto_sample option to find the n_samples automatically.

* change how csv dialects are passed around in attempt to fix a bug on Windows.