README first pass

README driven development :)
basic CLI support

This brings in redding/cli.rb and sets up the `dassets` bin.
config handling and tests

This brings in a config class and helpers.  It also defines the
basic config options and their defaults.
Digests handler with init behavior

On init, read the digests file into memory and access like a hash.
command runner class

Used to run the CLI commands and return errors appropriately.  This
also has the behavior for requiring in the config/dassets.rb file.
Merge pull request #1 from redding/kr-setup

Design and setup