Allow TagLayout to be set

[GoogleCodeExporter]

I am using version 1.0.3.

I'd like to be able to set the layout of the TAG. Generally, I'd like to narraw 
it down to the simple class name:

tagLayout = "%c{1}"

The LogConfigurator should have a public setter and hand the layout over to the 
appender: 

public void setTagLayout(final String tagLayout) {
   this.tagLayout = tagLayout;
}

Original issue reported on code.google.com by voydmachine@gmail.com on 5 Nov 2012 at 3:25