Improve the README

[noviluni]

This library doesn't have a website (apart from the docs), so the README should be treated as a presentation of the library.

I think we could add a fresher vision over this library and focus it over the use cases instead of including parts from the docs.

• Add new logo (blocked by add artwork #719)
• Installation
• Supported Python versions
• Basic examples (current content with some simplifications) with basic settings.
• Common use cases (more on this below)
• Multiple links to docs (how to contribute, etc).
• Recommendation: to use languages or locales when knowing the language to improve performance and unexpected behaviors.
• Explaining that what you have to pass to the parse() method is a date string, not a string containing a date.
• Explain that search_dates is not fully supported and it has a lot of limitations.

If you have any idea don't hesitate to add a comment!

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Ideas of use cases

When to use dateparser?

When consuming data from different sources:

• Scraping: extract dates from different places with several different formats and languages
• IoT: consuming data coming from different sources with different date formats
• Tooling: consuming dates from different logs / sources
• Format transformations: when transforming dates coming from files (PDF, CSV, etc.) to other formats (database, etc).

When offering natural interaction with users

• Tooling and CLI: allow users to write “3 days ago” to retrieve information.
• Search engine: allow people to search by date in an easiest / natural format.
• Bots: allow users to interact with a bot easily

[noviluni]

I started working on this.

My idea is to create a new README.md file (which is better supported by Github) and move the current content or part of the content to the docs. You can see a preview of the version I'm working here: https://github.com/noviluni/dateparser/tree/improve_readme

@Gallaecio any feedback will be welcomed :)

[noviluni]

Added new PR! #779

[noviluni]

As the PR #779 has been merged I will close this issue.

The missing sections will be omitted from the README as they are in the docs (and the search_dates has its own ticket: #737).