Fix issue causing <C-w>x to close all windows instead of one.

When I installed the latest version I found that <C-w>x (Single window close) would actually close all windows instead of just the current window.

The cause: It appears that the "VintageousOrigamiClose" class name was used when defining the action for both the single window close and all window close. As a result the 2nd class definition is used in both bindings.

I have renamed the 2nd class to VintageousOrigamiCloseAll and this has resolved the issue