Fixed minimal version of Eigen3 that supports sparse matrices

Author: lisitsyn

src/shogun/lib/tapkee/tapkee_defines.hpp

@@ -30,7 +30,7 @@
 	#define EIGEN_RUNTIME_NO_MALLOC
 	#include <Eigen/Eigen>
 	#include <Eigen/Dense>
-	#if EIGEN_VERSION_AT_LEAST(3,1,0)
+	#if EIGEN_VERSION_AT_LEAST(3,0,93)
 		#include <Eigen/Sparse>
 		#if defined(TAPKEE_SUPERLU_AVAILABLE) && defined(TAPKEE_USE_SUPERLU)
 			#include <Eigen/SuperLUSupport>

src/shogun/mathematics/eigen3.h

@@ -16,7 +16,7 @@
 	//#define EIGEN_RUNTIME_NO_MALLOC
 	#include <Eigen/Eigen>
 	#include <Eigen/Dense>
-	#if EIGEN_VERSION_AT_LEAST(3,1,0)
+	#if EIGEN_VERSION_AT_LEAST(3,0,93)
 		#include <Eigen/Sparse>
 	#else
 		#define EIGEN_YES_I_KNOW_SPARSE_MODULE_IS_NOT_STABLE_YET