Drone api setup

Express basic setup and drone connection attempt.  Drone connection not working yet.
Fixed stream deprecations.

Updated png stream methods.
Replacing AR Drone Commands with socket.io

After initial API setup and drone connect success, began switching commands to socket.io with diversario's suggestion.
Merge branch 'feature/kbevents' of https://github.com/diversario/ar-drone-client into diversario-feature/kbevents

    Conflicts:
        app.js
        package.json
        views/index.jade
        views/layout.jade
Re-structured control file to commands

Used module.exports for each command and renamed file.
Removed API calls in favor of socket.io commands

This code was left over after merge with diversario pull request.
Diversario commands file

File went uncomitted through merge.