Add search_base_attribute_values helper method to Base::Attribute.
Add usage details to POD for search_attribute_values.
Remove @values from main scope and declare lexically in loop.
Add DPI6 reference for usage in example.
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Add deep test for search_attribute_values output.
Remove unused dumper module from test.
Fix issue which caused deep test in BaseAttribute to fail.
Fix BaseAttribute deep test by removing literal defaults per 8e53629.
Remove fixture data for product attribute test.
Merge pull request #101 from interchange/features/search_base_attributes

Base::Attribute->search_attribute_values