Findref

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**Minor Improvements**

- ``python-Levenshtein`` is no longer mandatory dependencies.

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**Features and Improvements**

- Add ``aws_cloudformation`` dataset.
- Add ``pandas`` dataset.

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**Minor Improvements**

- Be able to handle delimiter character in user input query.
- Be able to handle single letter in user input query.

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**Bugfixes**

- Fix a bug caused by the logger.

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**Features and Improvements**

- Removed all "downloading dataset" logic, create another project to publish the dataset every month.
- The initial run (crawl data and build index) is much faster now, it takes 3-10 seconds, and it used to take 10-60 seconds.
- Rework the UI implementation, we no longer need to add a lot of code for adding a new dataset.

**Minor Improvements**

- Use asciinema to record demo.

**Miscellaneous**

- Improve the documentation.

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**Features and Improvements**

- Hit ``Ctrl + A`` to copy url to clipboard.
- Allow user to use ``!~`` to rebuild the index with the latest data.

**Miscellaneous**

- Minor refactor.