New editor/fold module

Extracted from feature/evil and emacs/hideshow.

init.example.el

@@ -43,6 +43,7 @@
        window-select     ; visually switch windows
 
        :editor
+       fold              ; (nigh) universal code folding
        ;;(format +onsave)  ; automated prettiness
        ;;lispy             ; vim for lisp, for people who dont like vim
        multiple-cursors  ; editing in many places at once
@@ -56,7 +57,6 @@
         )
        electric          ; smarter, keyword-based electric-indent
        ;;eshell            ; a consistent, cross-platform shell (WIP)
-       hideshow          ; basic code-folding support
        imenu             ; an imenu sidebar and searchable code index
        ;;term              ; terminals in Emacs
        vc                ; version-control and Emacs, sitting in a tree