Add TODOs for further stream writing work

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1053251 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/poifs/filesystem/NPOIFSMiniStore.java

      * Load the block, extending the underlying stream if needed
      */
     protected ByteBuffer createBlockIfNeeded(final int offset) throws IOException {
-       // TODO Extend
+       // TODO Extend the stream if needed
+       // TODO Needs append support on the underlying stream
        return getBlockAt(offset);
     }
     

src/java/org/apache/poi/poifs/filesystem/NPOIFSStream.java

  *  handle small block ones.
  * This uses the new NIO code
  * 
- * TODO Implement a streaming write method
+ * TODO Implement a streaming write method, and append
  */
 
 public class NPOIFSStream implements Iterable<ByteBuffer>
       blockStore.setNextBlock(lastBlock, POIFSConstants.END_OF_CHAIN);
    }
    
-   // TODO Streaming write support too
+   // TODO Streaming write support
+   // TODO  then convert fixed sized write to use streaming internally
+   // TODO Append write support (probably streaming)
    
    /**
     * Frees all blocks in the stream