serializer

I believe turtle does not handle quads, but our default serialization format for ConjunctiveGraph is turtle as turtle does not override the default for Graph, I guess we should probably change this, question is to what.

I think TriG would make most sense, but the other option is n3.

We want to implement a custom method with payload key name as metricValues, but the proper ruby method name should be snake_case.

class MetricPeriodSerializer < Panko::Serializer
        attributes :period, :metricValues

        def metricValues
           [{
            'name' => 'metric1',	
            'value' => object.metric_1	
          },	
           {