Adding two samples and removing the ConsoleApplication1 & 2 projects

I made C# versions of the zeromq weather update client and server (not 1:1 ports but pretty close - shows basic pub/sub anyway) and added the sample from the netmq readme as HelloWorld.  All of these are under the src\Samples folder.

As part of this I got rid of the ConsoleApplication1 and 2 projects.