add skin part caching

src/main/java/cc.fascinated/repository/PlayerSkinPartCacheRepository.java

@@ -0,0 +1,14 @@
+package cc.fascinated.repository;
+
+import cc.fascinated.model.cache.CachedPlayerName;
+import cc.fascinated.model.cache.CachedPlayerSkinPart;
+import org.springframework.data.repository.CrudRepository;
+
+/**
+ * A cache repository for player skin parts.
+ * <p>
+ * This will allow us to easily lookup a
+ * player skin part by it's id.
+ * </p>
+ */
+public interface PlayerSkinPartCacheRepository extends CrudRepository<CachedPlayerSkinPart, String> { }