Edit description about nodes and deserialization

Author: shadromani

src/main/java/com/maxmind/db/CacheKey.java

@@ -1,11 +1,11 @@
 package com.maxmind.db;
 
 /**
- * {@code CacheKey} is used as a key in the node cache. It contains the offset of the
- * node in the database file, the class of the data at that node, and the type
- * of the data at that node.
+ * {@code CacheKey} is used as a key in the data-section cache. It contains the offset of the
+ * value in the database file, the class of the value, and the type
+ * of the value.
  *
- * @param <T> the type of data stored at the node
+ * @param <T> the type of value
  */
 public final class CacheKey<T> {
     private final int offset;

src/main/java/com/maxmind/db/DatabaseRecord.java

@@ -6,7 +6,7 @@
  * DatabaseRecord represents the data and metadata associated with a database
  * lookup.
  *
- * @param <T> the type of data stored at the node
+ * @param <T> the type to deserialize the returned value to
  */
 public final class DatabaseRecord<T> {
     private final T data;

src/main/java/com/maxmind/db/NodeCache.java

@@ -3,7 +3,8 @@
 import java.io.IOException;
 
 /**
- * NodeCache is an interface for a cache that stores decoded nodes.
+ * NodeCache is an interface for a cache that stores decoded values from the
+ * data section of the database.
  */
 public interface NodeCache {
     /**