Fixed NuGet.config according to this: https://nuget.codeplex.com/workitem/3328
Fixed NuGet.config according to this: https://nuget.codeplex.com/workitem/3328

seanfitzg/log4mongo-net,jincod/log4mongo-net,shabbirh/log4mongo-net,log4mongo/log4mongo-net,jincod/log4mongo-net,emadb/log4mongo-net,w3he/log4mongo-net,iQmetrix/log4mongo-net