Update README.md

Deprecate Verbose Mode

README.md

@@ -8,13 +8,12 @@
 ### sha3sum Parallel Implementation written in Go
 
 <PRE>Usage of sha3sum:
-sha3sum [-v] [-b N] [-c &lt;hash.ext&gt;] [-r] &lt;file.ext&gt;
+sha3sum [-c &lt;hash.ext&gt;] [-b N] [-r] &lt;file.ext&gt;
   -b int
         Bits: 224, 256, 384 and 512. (default 256)
   -c string
         Check hashsum file.
-  -r    Process directories recursively.
-  -v    Verbose mode. (The exit code is always 0 in this mode)</PRE>
+  -r    Process directories recursively.</PRE>
   
 ### Examples:
 
@@ -26,7 +25,7 @@ $ ./sha3sum [-r] "*.*" > hash.txt
 
 #### Check hashsum file:
 <pre>
-$ ./sha3sum [-v] -c hash.txt
+$ ./sha3sum -c hash.txt
 </pre>
 ##### Exit code is always 0 in verbose mode.