Inline modifier for embedding CSS and JavaScript

Greetings! Thank you for really useful utility Denis.

I've made some changes which allow to inline (a.k.a. embed) styles and scripts into output html file. There are two pull requests this is the first one and other is into [grunt-processhtml](https://github.com/dciccale/grunt-processhtml). Last one contains updated [README.MD](https://github.com/makovich/grunt-processhtml/blob/master/README.md).

In two words: it is possible to use `inline` modifier with `js` and `css` build types.

Hope it will be helpful for somebody.