4-column and 4-column stacked layouts

Hello,

I attach two new layouts for your consideration for addition to Panels:

• 4-column
• 4-column stacked (i.e. a top panel, 4 column panels, a bottom panel)

They of course only need to be added to panels/plugins/layouts directory to work.

You can see the 4-column stacked layout in use at my online Thai lessons page.

Known, small issues I didn't manage to fix:

• because I currently don't have an image editor, is that I have not made a proper 4-column stacked image, so I have used the 3-column stacked image.
• I think there is a bit of uneven spacing on the columns (only a small space between columns 2 and 3).

I needed a 4-column stacked layout for my website . I found the following article to help me get what I needed:
http://miss-hana.com/creating-a-custom-layout-for-panels-3-in-drupal-7/

Attaching the zips. If you need these instead as a patch instead or as well, I could probably figure out how to do that, but my guess is that the zips are as easy as anything given that they are self-contained changes. If you do decide to add them to Panels, please give the git attribution to my user drupalshrek.