Add new alpha v. Lisp/Emacs example to docs

[RandomFractals]

see #14 for more info.

[RandomFractals]

New in Emacs section in docs: https://github.com/RandomFractals/chicago-crimes#in-emacs

[RandomFractals]

@ak-coram can take it from here & thanks for that Chi crimes in Emacs with Lisp lang. contrib!