Discretizer (#8)

* Add better check in testKBins.py

* Add Discretizer base class for Both discretizers

* Refactor order of constructors init

Discretizer.h

@@ -0,0 +1,31 @@
+#ifndef DISCRETIZER_H
+#define DISCRETIZER_H
+
+#include <string>
+#include <algorithm>
+#include "typesFImdlp.h"
+
+namespace mdlp {
+    class Discretizer {
+    public:
+        Discretizer() = default;
+        virtual ~Discretizer() = default;
+        virtual void fit(samples_t& X_, labels_t& y_) = 0;
+        inline cutPoints_t getCutPoints() const { return cutPoints; };
+        labels_t& transform(const samples_t& data)
+        {
+            discretizedData.clear();
+            discretizedData.reserve(data.size());
+            for (const precision_t& item : data) {
+                auto upper = std::upper_bound(cutPoints.begin(), cutPoints.end(), item);
+                discretizedData.push_back(upper - cutPoints.begin());
+            }
+            return discretizedData;
+        };
+        static inline std::string version() { return "1.1.3"; };
+    protected:
+        labels_t discretizedData = labels_t();
+        cutPoints_t cutPoints;
+    };
+}
+#endif