README.md in fd-0.3.1 vs README.md in fd-0.4.0

@@ -32,11 +32,43 @@
 
     $ gem install fd
 
 ## Usage
 
+You can pass _file names_ on the command line:
+
 ```
-fd [-w _number_] file_name [file_name]
+fd [-w _number_] [file_names]
+```
+
+For example:
+```bash
+> echo "Bacon ipsum dolor amet short ribs flank irure filet mignon brisket buffalo est porchetta." | fd -w 7
+STDIN
+42 61 63 6f 6e 20 69 |    B    a    c    o    n   __    i
+70 73 75 6d 20 64 6f |    p    s    u    m   __    d    o
+6c 6f 72 20 61 6d 65 |    l    o    r   __    a    m    e
[phone]f 72 74 |    t   __    s    h    o    r    t
[phone] |   __    r    i    b    s   __    f
+6c 61 6e 6b 20 69 72 |    l    a    n    k   __    i    r
[phone]c |    u    r    e   __    f    i    l
+65 74 20 6d 69 67 6e |    e    t   __    m    i    g    n
+6f 6e 20 62 72 69 73 |    o    n   __    b    r    i    s
+6b 65 74 20 62 75 66 |    k    e    t   __    b    u    f
+66 61 6c 6f 20 65 73 |    f    a    l    o   __    e    s
+74 20 70 6f 72 63 68 |    t   __    p    o    r    c    h
+   65 74 74 61 2e 0a |         e    t    t    a    .   LF```
+
+You can also pipe input to STDIN:
+
+```bash
+> echo "Put something into STDIN" | be bin/fd -w 5
+STDIN
[phone] |    P    u    t   __    s
+6f 6d 65 74 68 |    o    m    e    t    h
+69 6e 67 20 69 |    i    n    g   __    i
+6e 74 6f 20 53 |    n    t    o   __    S
+54 44 49 4e 0a |    T    D    I    N   LF
 ```
 
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `bundle exec rake test` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.