Minify v0.2.0

* Updated uglify-js to 2.2.5.

* Removed hashes control.

* Added ability to optimize images in any css.

* Updated css-b64-images to v0.2.3.

* Updated html-minifier to v0.5.0.

* Updated clean-css to v1.0.1.

* Fixed bug with generating html when html-minifier do not installed.