Update and modernize the documentation

NagyD / SDLPoP

An open-source port of Prince of Persia, based on the disassembly of the DOS version.

GNU General Public License v3.0

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Closed xyproto closed 2 years ago

xyproto commented 2 years ago

Use Markdown formatting for the README file. Remove <s> formatting. Make sure bullet point lists are formatted correctly.
Place the README in the standard location (project root) as README.md.
Place the license in the standard location (project root) as COPYING.
Try to improve the clarity of the text in README.md, while keeping the original intention behind the text.
Update build and installation instructions to also include Arch Linux (where SDLPoP works very well).

xyproto commented 2 years ago

I split the commit into three, to make it easier to see the changes.