This change removes the `.config_finder` object from the `Application`.
Since the configuration finder is only needed during initialization, we
constrain the finder to be returned and passed to other methods
necessary for initialization.
The `ConfigFileFinder` doesn't utilize the preliminary arguments (i.e.,
the file names) anymore for computing the starting path for the
configuration file search.
The preliminary options and arguments returned from
`.parse_preliminary_options_and_args()` are now all threaded through to
the appropriate methods during initialization.
The configuration file and boolean to ignore configuration files can be
threaded through now that `.parse_preliminary_options_and_args()`
returns options and arguments.
Now that `.parse_preliminary_options_and_args()` returns options and
arguments, the boolean for appending configuration and the arguments can
be threaded through to the creation of the `ConfigFileFinder`.
The verbosity and output file options can be obtained from options
returned by `.parse_preliminary_options_and_args()`, instead of state
from the `Application` object.
