piping from cat seems broken

Hey,

I noticed that a lot of output gets missing when I pipe from `shx cat`. However, `shx cat` by itself seems to work fine.

Example:

```
shx cat src/app/**/*.js > /tmp/output && wc /tmp/output
   15655   41088  460494 /tmp/output

shx cat src/app/**/*.js | wc
    2181    5902   65536
```

For comparison:

```
 cat src/app/**/*.js | wc
   15655   41088  460494
```

I'm running `0.1.4`
