Fixed .rvmrc to use Ruby 1.9.3 instead of 1.9.2
Updated syntax of Rspec expectations on api_document_spec
Updated syntax of Rspec expectations on api_parameter_spec
Updated syntax of Rspec expectations on api_parser_spec
Added pending message to api_response_spec
Updated syntax of Rspec expectations on doc_generator_spec
Updated syntax of Rspec expectations on api_resource_spec
Fixed doc_generator_spec
Added field_type and sample_value to be filled by grape :type and :documentation[:example] keys
Added field_type and sample_value in document formatter