add freetype to btypes library

btypes_big_integer/src/main/java/de/hhu/stups/btypes/BFreetype.java

+package de.hhu.stups.btypes;
+
+public class BFreetype implements BObject {
+
+    public BBoolean isFreetype() {
+        return new BBoolean(true);
+    }
+
+    public BBoolean isNotFreetype() {
+        return new BBoolean(false);
+    }
+}

btypes_primitives/src/main/java/de/hhu/stups/btypes/BFreetype.java

+package de.hhu.stups.btypes;
+
+public class BFreetype implements BObject {
+
+    public BBoolean isFreetype() {
+        return new BBoolean(true);
+    }
+
+    public BBoolean isNotFreetype() {
+        return new BBoolean(false);
+    }
+}