Added serializable support

src/main/kotlin/net/axay/kspigot/serialization/SpigotSerializable.kt

@@ -0,0 +1,27 @@
+package net.axay.kspigot.serialization
+
+import net.axay.kspigot.main.ValueHolder
+
+interface SpigotSerializable<T> {
+    /**
+     * Converts this serializable object
+     * into the corresponding spigot object.
+     */
+    fun toSpigot(): T
+}
+
+interface SpigotSerialzableCompanion<T>
+
+/**
+ * @return A json string.
+ */
+fun SpigotSerializable<*>.serialize(pretty: Boolean = true): String
+        = ValueHolder.getGson(pretty).toJson(this)
+
+/**
+ * Deserializes the given json string and
+ * returns the deserialized object.
+ */
+@Suppress("unused")
+inline fun <reified T> SpigotSerialzableCompanion<T>.deserialize(json: String): T
+        = ValueHolder.getGson(false).fromJson(json, T::class.java)