Log4net v1.2.12 integration

I have added log4net v1.2.12 integration
I simply made a replica of the log4net v1.2.11 integration, no alterations to take advantage of new log4net features and no extra tests were added
The log4net library reference's were taken from the nuget package
	I used the log4net net40-full binary for the .net v4.0 project
	I continued to use the lib\Log4Net1212\net\2.0 reference for the non .net v4.0 project

I did not update the readme.txt file

Thanks
Pat