delegate blank to source
Merge pull request #532 from buddhamagnet/master

Delegate `blank?` to source
Add spec for #blank? delegation
Fix build failure

rspec-rails 2.13.1 checks Rails.version when loading RailsExampleGroup
which is used by ammeter. Therefore we need to require rails.
use block_given in module_namespacing
Merge pull request #533 from buddhamagnet/master

Use block_given? in module_namespacing method
Rename `source` to `object`

Closes #501
Merge pull request #534 from haines/object

Rename `source` to `object`
Rename `source_class` to `object_class`
Merge pull request #535 from haines/object_class

Rename `source_class` to `object_class`