material and 5 temporary vectors no longer go into the savegame

src/net/torvald/terrarum/KVHashMap.kt

@@ -3,6 +3,12 @@ package net.torvald.terrarum
 typealias ItemValue = KVHashMap
 
 /**
+ * Supported Value Types:
+ * - Int
+ * - Double (`getAsFloat()` first retrieves the Double value then casts to Float)
+ * - Boolean
+ * - String
+ *
  * Created by minjaesong on 2015-12-30.
  */
 open class KVHashMap {
@@ -42,47 +48,29 @@ open class KVHashMap {
     }
 
     fun getAsInt(key: String): Int? {
-        val value = get(key)
-
-        if (value == null) return null
-
+        val value = get(key) ?: return null
         return value as Int
     }
 
     fun getAsDouble(key: String): Double? {
-        val value = get(key)
-
-        if (value == null) return null
-
-        if (value is Int)
-            return value.toDouble()
-
+        val value = get(key) ?: return null
+        if (value is Int) return value.toDouble()
         return value as Double
     }
 
     fun getAsFloat(key: String): Float? {
-        val value = get(key)
-
-        if (value == null) return null
-
-        if (value is Float) return value as Float
-
+        val value = get(key) ?: return null
+        if (value is Float) return value
         return getAsDouble(key)?.toFloat()
     }
 
     fun getAsString(key: String): String? {
-        val value = get(key)
-
-        if (value == null) return null
-
+        val value = get(key) ?: return null
         return value as String
     }
 
     fun getAsBoolean(key: String): Boolean? {
-        val value = get(key)
-
-        if (value == null) return null
-
+        val value = get(key) ?: return null
         return value as Boolean
     }