Add a macro to display a list of panels in columns

Add CSS to improve in page panels printing and create a "displayPanelLayout" macro that takes number of columns and list of panels to display and dispatch them dynamically in the columns.

Example:

#displayPanelLayout(3 ["Panels.BlogCategories", "Panels.QuickLinks", "Panels.BlogCategories", "Panels.QuickLinks"])

Works only for albatros skin.