Refactor tests.

Refactoring test suite.
UploadedFile class should implement file interface.

Stapler's UploadedFile class should implement the FileInterface.
Store config information inside native config.

Configuration information for the native config driver is now stored
directly inside the driver class itself (as opposed to trying to read it
from a file).
Remove extraneous config directory.

Removed the extraneous config directory since configuration information
is now stored directly inside the NativeConfig class.
Change :laravel_root interpolation to :app_root.

Changed the :laravel_root interpolation to :app_root.
Update composer.json to require Illuminate\Config.

Upated composer.json to require Illuminate\Config library for dev.
Write test for Stapler class.

Wrote tests for the Stapler builder/creator class.
Fixed several bugs that were discovered.
Use realpath for empty.gif.

Now using realpath function in ReseizerTest for referencing empty.gif
fixture.