* Remove Windows msvc project files and move build instructions to single BUILDING.md file.
* Move HACK.txt to Contributing and update it.
* Add refactoring guide.
* Add known bugs
* Remove compatibility headers.
* Fix smaller issues.
* Remove 'possible revert' column. People always can do manual changes.
* Move instruction alias description to the top
* Add table to general breaking changes.
* Update general release guide with the newest information.
* Highlight NanoMips and be more precise in writing.
* Add note about archs without alias.
* Add sentence about what is planned.
* Small corrections for Windows build instructions and debug macros.
* Fix rebase issues.
* Bring back make.sh for the CI
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