Fixes the shortcuts and the menu

Hi, I like the idea behind your plugin so I wanted to help for a new version!

Here I fixed the short cut, but had to change it to CTRL+SHIFT+P since CTRL+P bring the print preview.

I've fixed all the doc for the version 0.3 too (Added my name in the same time if you don't mind)

By the way take care will pushing this plugin to the directory, don't create an other duplicate please...