Scrapydweb

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- Improvements
- Support accessing Scrapyd servers protected by basic auth
- Add navigation buttons for switching to the same page (e.g. the Stats page) of a neighboring node
- Update caching mechanism: finished job would be cached only once
- Remove .log.gz and .gz extension in the 'Log Parser' page
- Others
- Change SCRAPYDWEB_SETTINGS_PY to 'scrapydweb_settings_v2.py'

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- Improvements
- Add the Items page
- Add SCRAPYD_LOG_EXTENSIONS for locating Scrapy log
- Bug Fixes
- Fix the bug that auth argument from the command line does not take effect

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- Improvements
- Support :closed_lock_with_key: **basic auth for web UI**

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- Others
- Add __version__.py and update setup.py

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- Others
- Update README.md and screenshots

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- First release version