remove references to Storage

Remove all references to the non-implemented, non-working Storage module
per request of the OA.
Merge pull request #136 from dyoung522/fix/remove-storage

remove references to Storage
CAP: expect NAK, not NACK
bump version to 2.0.8
Merge branch 'maint'

Conflicts:
	examples/plugins/memo.rb
	lib/cinch/storage/yaml.rb
fix ipv4 addresses in dcc send
bump version to 2.0.9
Merge branch 'maint'
Allow hooks for specific matcher groups

Fixes #143.
Simplify hook selection logic
documentation tweaks
Merge branch 'programble-hook-groups'