request for more documentation

[brown]

Please add documentation to the README file to describe:

1. How to compile and load cl-lsp using Quicklisp, especially where to find lem packages.
2. How to run the server. Perhaps add a small shell script that serves as an example.
3. Instructions for connecting to a running server using Slime to debug problems.

I'm interested in trying cl-lsp with Emacs. Thanks for writing cl-lsp!