adding Covariance functions

Author: Andrew Packard

OREAnalytics-SWIG/SWIG/orea_app.i

@@ -133,7 +133,9 @@ public:
     void setVarMethod(const std::string& s);
     void setMcVarSamples(Size s);
     void setMcVarSeed(long l);
-    // TODO: API for setting covariance data 
+    // TODO: API for setting covariance data
+    void setCovarianceData(ore::data::CSVReader& reader);
+    void setCovarianceDataFromBuffer(const std::string& xml);
     // const std::map<std::pair<RiskFactorKey, RiskFactorKey>, Real>& covarianceData();
     // TODO: API for setting a sensitivity stream
     // const boost::shared_ptr<SensitivityStream>& sensitivityStream();