copy to both icls and xml formats

I have been banging my head around hour because any changes I've made to xml files were not visible in PhpStorm. Appeared that latest Intellij-based products [use icls format](http://confluence.jetbrains.com/pages/viewpage.action?pageId=49463468) with fallback to xml if former not found.

In my case I've customized fonts and settings were copied from `Solarized Dark.xml` to `Solarized Dark.icls`. And freshly built `settings.jar` updated xml format only. And nothing changed for me

This PR adds preliminary support for icls format: simple copy from xml to icls to overwrite it. `settings.jar` provided in #50 already includes icls files. More coming up!