Fix broken validation messages

A typo in #122 appears to
have introduced an error here that's causing a large number of test
failures.

Closes #124, closes #123

lib/valid_email/email_validator.rb

@@ -22,7 +22,7 @@ def validate_each(record,attribute,value)
  end
  unless r
  msg = (options[:message] || I18n.t(:invalid, :scope => "valid_email.validations.email"))
- record.errors.add attribute, message: I18n.interpolate(msgs, value: value)
+ record.errors.add attribute, message: I18n.interpolate(msg, value: value)
  end
  end
 end