Update README with 2.0.0 information.

With the massive changes introduced in 2.0.0 of this cookbook.  The
README has been updated to reflect this.
Add test suites to kitchen for individual components.

Factored out the common recipes and particular recipes to a platform.
Also, created suites for tinge blend and margarine to ensure they are
installed correctly individually as well as together from the default
recipe.
Simplify the Vagrantfile.

The Vagrantfile doesn't need to be overly complex with the use of
test-kitchen to verify behavior.  Just enough that we can quickly spin
up and see that things converge.
Add nginx suites for tinge and blend.

Since we use nginx in production we should probably consider having test
suites involving that deployment of tinge and blend.
Add data_bags path to Vagrantfile.
Add missing slash to uwsgi wsgi-file path.
Add default logging mechanism to vagrant boxes.

This brings up an excellent question about the logging mechanism shipped
with this cookbook.  The defaults should run but currently they do not.
Should the default be to setup logging or just use a dummy logger always
and add the others as configured?