Update for PureScript 0.9.x?

This project uses PureScript 0.7.x, which is a couple of revisions behind now.

One option for "updating" this to 0.9.x would be to leave the code as-is, and just update the README to note that `pulp init` can create a very similar project template, along with minor differences from the current README and blog post. Amongst these are:
- You must now use `pulp psci` to run the interpreter.
- `pulp server` doesn't work with the project created with `pulp init`.
- We now use `bower update` rather than the deprecated `pulp dep update`.

(One might also note how you could re-use files here in the `pulp init` template project to get the server to work.)

Review the README and the referenced blog post against the PureScript 0.9.x workflow, starting with the current `pulp init` template and the listed command changes. Done means the documentation accurately explains the updated setup, interpreter and dependency commands, server limitation, and any reusable files needed for the server.

Written by the indexing model from the issue text.