started removing KLib related code:

- assertions
- distributions
new helper methods
worked on stairs
worked on grid-walkers
worked on navigation

Assertions.h

@@ -0,0 +1,60 @@
+#ifndef ASSERTIONS_H
+#define ASSERTIONS_H
+
+#include "Exception.h"
+
+/**
+ * this file provides assertion methods that may be enabled to trace
+ * coding errors efficiently during debug or disabled to speed up the
+ * code execution for the release build
+ *
+ * compile with -DWITH_ASSERTIONS
+ */
+namespace Assert {
+
+
+	static inline void doThrow(const char* err) {
+		#ifdef WITH_ASSERTIONS
+			std::string str = "in: ";
+			str += __PRETTY_FUNCTION__;
+			str += " error: ";
+			str += err;
+			throw Exception(err);
+		#endif
+	}
+
+	template <typename T> static inline void equal(const T v1, const T v2, const char* err) {
+		if (v1 != v2) {doThrow(err);}
+	}
+
+	template <typename T> static inline void isTrue(const T v, const char* err) {
+		if (!v) {doThrow(err);}
+	}
+
+	template <typename T> static inline void isFalse(const T v, const char* err) {
+		if (v) {doThrow(err);}
+	}
+
+	template <typename T> static inline void isNull(const T v, const char* err) {
+		if (v != nullptr) {doThrow(err);}
+	}
+
+	template <typename T> static inline void isNotNull(const T v, const char* err) {
+		if (v == nullptr) {doThrow(err);}
+	}
+
+	template <typename T> static inline void isNotNaN(const T v, const char* err) {
+		if (v != v) {doThrow(err);}
+	}
+
+	template <typename T> static inline void isNot0(const T v, const char* err) {
+		if (v == 0) {doThrow(err);}
+	}
+
+	template <typename T> static inline void isBetween(const T v, const T min, const T max, const char* err) {
+		if (v < min || v > max) {doThrow(err);}
+	}
+
+}
+
+#endif // ASSERTIONS_H