TidesNet is the networking library of the Eir development environment. It is designed to be used in realtime game engines as well as business applications.
Other project repositories are required to compile TidesNet. Those have to be put in the same location as the tidesnet folder.
If you want to use this code in your own project you are meant to create a “vendor” directory in which you perform a “check-out” of it along with the listed dependencies. Here is a tutorial on how to set up your SVN repository.