add speedbar feature

I tested the graphene and it works well. 

But It just begin, I do not configure it to make it better. 
And I do not know org mode to indent the source code , so I am beginning to learn it . 

Hope you can make the speedbar feature. 

(I disable the eval-mode because i use emacs keyboard-map  , if you think this request is worth for you , you have to decide what will you add to your repo)