Development web server rake task
Development web server rake task

`rake dev` to start a development web server using spec/dummy

```console
$ rake dev
INFO  WEBrick 1.3.1
INFO  ruby 2.1.3
INFO  WEBrick::HTTPServer#start: pid=65828 port=9292
```

thredded/thredded,jvoss/thredded,jayroh/thredded,prohippocoder/thredded,jayroh/thredded,jvoss/thredded,thredded/thredded,prohippocoder/thredded,thredded/thredded,jvoss/thredded,thredded/thredded,prohippocoder/thredded,jayroh/thredded,prohippocoder/thredded,jayroh/thredded,jvoss/thredded