If you're using Linux, download the server.so, replace server.so in the bin folder:

https://www.dropbox.com/s/fkpdqsrpz1ctn4f/server.so?dl=0

These are the source code files.

Visual Studio 2013 is required to edit and compile without error.

Locate to directory source-sdk-2013-master/mp/src/games.sln Inside games.sln project file, in Visual Studio 2013, go to "Find All Files" Search for Ethorbit, this will show all or at least 90% of the code I've added into the mod, so you can easily fix bugs, see my work, or add more code.