To learn more about Codr, see http://codr.io.
Codr is not an IDE: it’s not a development environment at all. Codr will not provide remote file-system access, terminal access, or other features necessary to use Codr as a coding environment.
Codr is also not designed to support pair programming. To pair program, you need access to a full development environment, including the ability to actually run the program in question.
For the pair programming use-case, I'd highly recommend Screen Hero or a shared tmux/screen/byobu session if coding in the terminal is your thing.