i2psnark: Add torrent edit page

Additional UI cleanup to follow

apps/i2psnark/java/src/org/klomp/snark/MetaInfo.java

@@ -82,8 +82,9 @@ public class MetaInfo
    *  @param created_by may be null
    *  @param url_list may be null
    *  @param comment may be null
+   *  @since public since 0.9.53, was package private
    */
-  MetaInfo(String announce, String name, String name_utf8, List<List<String>> files, List<Long> lengths,
+  public MetaInfo(String announce, String name, String name_utf8, List<List<String>> files, List<Long> lengths,
            int piece_length, byte[] piece_hashes, long length, boolean privateTorrent,
            List<List<String>> announce_list, String created_by, List<String> url_list, String comment)
   {
@@ -442,9 +443,12 @@ public class MetaInfo
   }
 
   /**
-   * Returns the piece hashes. Only used by storage so package local.
+   *  Returns the piece hashes.
+   *
+   *  @return not a copy, do not modify
+   *  @since public since 0.9.53, was package private
    */
-  byte[] getPieceHashes()
+  public byte[] getPieceHashes()
   {
     return piece_hashes;
   }

apps/i2psnark/java/src/org/klomp/snark/Snark.java

@@ -1321,6 +1321,15 @@ public class Snark
       }
   }
 
+  /**
+   * Call after editing torrent.
+   * Caller must ensure infohash, files, etc. did not change.
+   *
+   * @since 0.9.53
+   */
+  public void replaceMetaInfo(MetaInfo metainfo) {
+      meta = metainfo;
+  }
 
   ///////////// Begin StorageListener methods