First release of Spacemacs

• projectile working
• use the projectile commander initiated with p (see doc: https://github.com/syl20bnr/spacemacs#project-management)
• more support for fd exit everything
• faster boot time
• stable key bindings for ido-vertical-mode
• working lazy loading of helm
• describe functions binding with prefix h d (see: https://github.com/syl20bnr/spacemacs#other-describe-functions)