Use Ctrl+Shift+Y as a shortcut (will be changed)

Ctrl+Shift+Y combination added to copy decoded url from address bar/omnibox to clipboard.
This shortcut will be changed in next versions: follow #3 to get latest news.

How to install:

Unzip to a folder.
Open chrome://extensions.
Switch on developer mode.
Load unpacked extension from the folder.
You will not get automatic updates by this way of installation, only extensions installed from WebStore are updated automatically.