Updated installation instructions.

Adjusted formatting for installation list. Now no longer recommending `sudo` when running `npm install`. Added section on how to run server.
Merge branch 'refs/heads/master' into feature/installation
Merge pull request #5 from hazardu5/feature/installation

Updated installation instructions.
Merge branch 'refs/heads/master' into feature/room-list
Merge branch 'feature/room-list' of github.com:hazardu5/janus-server into feature/room-list