Readme missing two steps

[tyrion70]

The readme seems to be missing two steps to run the dev-server environment

lein npm install
lein build-css

only after running those steps did I get the server running. I would add a PR for this if I was sure that these are the right commands. Please let me know if you want a PR for it or I should run something else.

[benzap]

Hi @tyrion70,

I'll throw in an update for the readme changes in my free time. Alternatively, you can use lein deps as a more general command to install all dependencies including the npm based ones.

I'll also see if I can streamlines things a bit more for development. Thanks for the feedback!