Ubuntu 18.04's objdump is too old (2.30) devkitA64's objdump is also too old (2.32) and doesn't support --source-comment
...to simplify setup a bit
* Fix the CMake minimum required version * Add a note about using the official CMake APT repo to update CMake on Ubuntu * Add a note about setting the PATH for devkitA64 * Mention CMake Tools for Visual Studio Code