Add Neo Tree buffer with `<SPC> p b` key binding

README.md

@@ -785,6 +785,7 @@ Projects management commands (start with `p`):
 
     Key Binding   |                 Description
 ------------------|------------------------------------------------------------
+`<SPC> p b`       | toggle the [neotree][neotree] navigation buffer on the side
 `<SPC> p C`       | invalidate the cache of `projectile`
 `<SPC> p d`       | open a `dired` buffer at the root of the project
 `<SPC> p f`       | open a file of the project using `helm`
@@ -1194,3 +1195,4 @@ Thank you to the whole Emacs community from core developers to elisp hackers!
 [smeargle]: https://github.com/syohex/emacs-smeargle
 [git-timemachine]: https://github.com/pidu/git-timemachine
 [git-messenger]: https://github.com/syohex/emacs-git-messenger
+[neotree]: http://www.emacswiki.org/emacs/NeoTree

spacemacs/packages.el

@@ -75,6 +75,7 @@
     monokai-theme
     move-text
     multi-term
+    neotree
     org
     org-bullets
     ;; annoying error message, disable it for now
@@ -1086,6 +1087,13 @@ inserted in the buffer (if it is not read-only)."
 
       (add-to-list 'term-bind-key-alist '("<tab>" . term-send-tab)))))
 
+(defun spacemacs/init-neotree ()
+  (use-package neotree
+    :defer t
+    :init
+    (progn
+      (evil-leader/set-key "pb" 'neotree-toggle))))
+
 (defun spacemacs/init-org ()
   (use-package org
     :mode ("\\.org$" . org-mode)