Updating this repo with the latest global theme updates.

Renamed style.css to default.css as this broke ZPanel.
Added the unlimited.png file as this was missing.
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I have created a GitHub repo for all ZPanelCP themes (as long as they conform to our standards), so have added that in the Readme.
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There are more theme updates to come. 
There will be a new way to shade all icon's the same color as your theme.