Revert "Destroyed Boards Manager FAQ (markdown)" This reverts commit a905bdd30a1bca6c7d7109ca6236c44cff709d6c. This page was removed without any rationale, and asking for it in https://github.com/arduino/Arduino/issues/6543 prompted no response. Since this page still seems current and useful, I'm restoring it.
Destroyed Boards Manager FAQ (markdown)
Now that the package_index.json format specification has been published it is the best reference for adding Boards Manager support
use of portable folder added
Added a link to the boards list
3rd party boards support via Boards Manager URLs
Updated Boards Manager FAQ (markdown)
fixed a typo: "if" -> "is"
Created Boards Manager FAQ (markdown)