add diagram on filer read

Directories-and-Files.md

@@ -56,10 +56,7 @@ We can take the following steps to map a full file path to the actual data block
 
 #### Architecture
 
-For reads:
-1. Client Read File Metadata => Weed Filer => Weed Filer database (LevelDB, Cassandra, Redis, Mysql, Postgres, etc)
-2. Client Read File Chunks => Weed Volume Servers
-
+For file reads:
 ![](FilerRead.png)
 
 For writes: