dotspacemacs-fullscreen-at-startup

- dotspacemacs-fullscreen-at-startup now toogles fullscreen, not maximize
- dotspacemacs-maximized-at-startup added, toogles maximized as the old dotspacemacs-fullscreen-at-startup did
Tweak new variable dotspacemacs-maximized-at-startup
Add global mode string to mode line

Resolves #267.
Fancy symbols for Clojure's anonymous functions and set literals
Add align-cljlet package to clojure layer
Fixed evil-surround inconsistency
Fix for dotspacemacs-fullscreen-at-startup on windows
Reverts #280 Fix evil-surround vim-surround inconsistency
Fix minor documentation issue
moved html and css packages to a contrib layer
company-mode: added support for include file completion
Add whitespace-mode toggle option.
Add whitespace package to spacemacs layer

Diminish lighter to Ⓦ
Add useful new macro `let-alist` to spacemacs layer
Init fancify symbols in clojure mode without cider
Move fancify symbols in clojure layer + refactorings

Refactoring aims at eliminate redundancy of sexp where
it is possible.
Remap visual state `s` to evil-surround

After change made in https://github.com/timcharper/evil-surround/pull/48
enabled js2-imenu-extra-mode in javascript mode
Add comment for js2-imenu-extra-mode activation
Remove use-package sub-module it is now a bootstrap package