Bump version to 0.105.9 and update change log

Update change log for 0.105.8

Bump version to 0.105.7 and update change log

Bump version to 0.105.6 and update change log

Bump version to 0.105.5 and update change log

auto-completion: refactor yasnippet config

- Move all setq outside of spacemacs/load-yasnippet
- Explicitly add each snippet dirs, even the one in elpa dir

Before this commit I still get error on yasnippet loading, with this
commit the error is gone.

I hope we get yasnippet loading right this time! :-)

core: update home buffer links to point to spacemacs.org

Remove unneeded variable spacemacs-mode-line-new-version-lighterp

Bump version to 0.105.1 and update change log

Add release date to change log