Isilon-sdk

This release resolves a number of PAPI schemas and updates the documentation.

This release improves the SDK on a number of fronts:

- Support for Swagger Codegen [v2.3.1](https://github.com/swagger-api/swagger-codegen/releases/tag/v2.3.1)
- Replaces basic auth with session auth, which includes support for CSRF tokens
- Resolves issues 8, 9, 10, 11, 12, 13, 14, 15, 22, and 26.
- Introduces configurable logging instead of `print` statements
- Adds properties `maxLength`, `minLength` and `pattern` to the Swagger config
- Handling on invalid PAPI describe schemas
- Linting with `pylint` and `pep8`

Introduces `isi_sdk_8_1_0` for OneFS 8.1.0 support.

Includes a fix for 32: Proper handling of Python 2 type longs.

isi_sdk_8_0_1` is built against the newest MR 8.0.1.2 which included some fixes to PAPI schemas (fixes 23)