Remove inline in CContingencyTableEvaluation

CContingencyTableEvaluation::get_evaluation_direction function was defined as an inline in the implementation. this caused problems by compilation errors of modular interfaces.
thanks for the bug report Wenlin Hu!

src/shogun/evaluation/ContingencyTableEvaluation.cpp

@@ -52,7 +52,7 @@ float64_t CContingencyTableEvaluation::evaluate(CLabels* predicted, CLabels* gro
 	return 42;
 }
 
-inline EEvaluationDirection CContingencyTableEvaluation::get_evaluation_direction() const
+EEvaluationDirection CContingencyTableEvaluation::get_evaluation_direction() const
 {
 	switch (m_type)
 	{