Add scss mode
Emacs - show λ instead of "function" in js2 mode

Reduces some noise in JS files. Copied from ahinz

https://github.com/ahinz/emacs-config/blob/e04cda76030f7adaacfff0706a267a7c3d71c010/.emacs.d/ah-modes.el#L183
Emacs - Start scratch buffer in text mode

I use the scratch buffer for ad hoc text formatting more than evaling
lisp.