Correct a bug in helm-spacemacs: Whenever a function was needing the
FAQ's candidates in helm-spacemancs (`SPC f e h` and `SPC f e f`), the
`FAQ.org` file was open in a buffer and not closed. This commit corrects
this by loading the content of `FAQ.org` in a temp buffer and switch it
to `org-mode` in order to get the candidates.
Add the `FAQ.org` file as a source in helm-spacemacs (`SPC f e h`).
Define a new keybinding for looking directly inside the FAQ with helm:
`SPC f e f`.
With help from TheBB, thanks!
