include .sbclrc and Quicklisp; minimize Emacs initialization footprint

* include .sbclrc and Quicklisp

include Quicklisp and a few useful packages (e.g., alexandria,
        hunchentoot, swank, pprel and their dependencies) to make a
self-contained useful SBCL environment for development.

* minimize Emacs initialization footprint

change .emacs to minimize startup dependencies (failure of which can
        cause noisy complaints from Emacs). a user should adapt to local environment.