use local cache instead of syncing

[zeruth]

I suggest using the cache module of runelite itself.

Something along the lines of:

	public void dumpCache() throws IOException
	{
		Store store = new Store(DEFAULT_CACHE_DIR);
		store.load();
		Storage storage = store.getStorage();
		store.getIndexes().forEach(index ->
		{
			log.debug("Dumping index " + (index.getId() + 1) + "/20");
			index.getArchives().forEach(archive ->
			{
				try
				{
					byte[] archiveData = storage.loadArchive(archive);
					if (index.getId() == 5)
					CacheFiles.write(index.getId(), archive.getArchiveId(), archiveData);
					else
					{
						archive.getFiles(archiveData).getFiles().forEach(fsFile ->
							CacheFiles.write(index.getId(), archive.getArchiveId(), fsFile.getContents()));
					}
				}
				catch (IOException e)
				{
					e.printStackTrace();
				}
			});
		});
	}

And maybe detect an incomplete cache or wait until LOGIN_SCREEN as you have a full cache by that time.