LOG4NET-290 added an ILog extension that wraps the most common logging statements in a central place

Basically statements like these:
if (log.IsDebugEnabled) log.DebugFormat("x: {0}", 123)

can now be shortened to:
log.DebugExt("x: {0}", 123)

git-svn-id: https://svn.apache.org/repos/asf/logging/log4net/trunk@1476902 13f79535-47bb-0310-9956-ffa450edef68