move VERSION into cinch/extensions/storage/version.rb
refactor directories

- remove cinch/configuration directory
  (now cinch/extensions/storage/config.rb)

- create cinch/extensions/storage directory for the project files

- move cinch/configuration/storage.rb to
  cinch/extensions/storage/config.rb

- rename cinch/extensions/storage.rb to
  cinch/extensions/storage/container.rb

- create lib/storage.rb to hold common requires, this allows for a
  a single require 'storage' line to include the entire gem.

- update tests to reflect these changes
rename lib/storage.rb to lib/cinch-storage.rb
Add documentation
refactor to use method_missing for Hash-like methods