Chrome extension adding shortcuts for closing and pinning tabs.

The extension consists of three keyboard shortcuts:

* Alt-Shift-O: Close Other Tabs
* Alt-Shift-R: Close Tabs to the Right
* Alt-Shift-P: Pin Tab

Note: A separate extension, tabloid, adds the following shortcuts to Chrome

* Move Tab Right
* Move Tab Left
* Move Tab to First Position
* Move Tab to Last Position

Chrome extensions currently only allow for a maximum of four shortcuts, which is why they are not included in tabasco.

You can fetch tabloid here: https://chrome.google.com/webstore/detail/femidpfpildjfepkcaodpalpakgadjih"