Use PSR-4 autoloader.
Moved Test out of App.
Merge pull request #13 from ADmad/composer

Composer updates
kill a few newlines in App/Config/bootstrap.php
Kill a few newlines in App/Config/app.php.default
Add boris as a dev dependency.

Having boris will allow the app skeleton to provide a REPL on platforms
supported by boris. Right now windows is not one of those platforms, but
I've been unable to find a good REPL for windows.

Refs #11
Remove file headers.
Add a basic REPL to the skeleton.

Include some help and error handling for boris not being installed.

Refs #11
Rename ReplShell to ConsoleShell.
Loosen requirements on boris.
Merge pull request #15 from cakephp/add-repl

Add a REPL to the app skeleton