Add --no-colors option

When i write code in Sublime Text 2 editor i'm using jscs in my custom build system. In sublime's output console it looks quite uglish, so i have to use 
```bash
jscs $1 | sed -r "s/\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[m|K]//g"
```
to beutify output. This option should be very usefull: 
```bash
jscs -n $1
```