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[beckyjackson]

Resolves #84

The vaidate_cogs_project() method now returns the abs path of the .cogs directory to allow calling cogs commands from child directories.

[jamesaoverton]

If we're going to change all these function signatures now, I think we should future-proof this by using a config dict with a dir key rather than a cogs_dir string. What do you think?

[beckyjackson]

What other items could you see adding to a config dict? I'm not against it, I just can't think of what else would go in it.

[jamesaoverton]

This code passes around the cogs_dir string so that you can call a utility function to read required configuration data out of some file in the .cogs/ directory. The alternative is to pass around the configuration data.

In our case, everything we need should be stored in a file somewhere in .cogs/, and there's no point in loading it until we need it. So after giving it some thought, now I think that passing around the cogs_dir string is better.