cleaner validation
plus sign for new issues button
updated PDF button

Conflicts:
	config/locales/en.yml
updated ship button
add shipped and unshipped scopes to issues
add unship and delete to issues

Conflicts:
	config/locales/en.yml
allow for theoretical possibilty of getting shipped more than one issue and unshipping all of them
fix typo in en.yml
adding canceled scope and canceled? boolean

Conflicts:
	app/models/spree/subscription.rb
subscription model now has issues through shipped_issues
adding migration to default remaining issues to zero rather than nil
Filling out Issues Spec for unship and delete
removing temporary il8n
more explicitly specify that unship is for the most recently shipped issue
add Subscriptions tab to Admin/Users
removing unneeded quotes from il8n
cleaner Gemfile syntax in README
make il8n consistent with specs
using Ruby 1.9 hash colons
update issues spec to be consistent with il8n