Generate a bootstrap wrapper in the module checkout folder

This script is getting messy... But it can now create a
koharness_bootstrap.php file in the current working directory which serves
the same purpose as the stock kohana index.php of defining the key paths
(pointing to the koharness temporary path) and including the application
bootstrap.

So now your module tests/specs can do a
require_once(__DIR__.'/../relpath/to/koharness_bootstrap.php') and get a
fully bootstrapped Kohana install using whatever modules you define.

So you can do this:

git clone git@github.com:me/my-module
cd my-module
composer install
vendor/bin/koharness
vendor/bin/phpspec

or whatever.
Add a Session_Fake driver to mock session storage for use in tests

Note that this class is not autoloaded - if you need it, include it
manually into your spec file etc - or register an autoloader if you
want one.