Bindings! Rename! All Sorts Of Things!

I'm not opposed to leaving this in the README, but it's not strictly true—you can select both scripts and watched-folders outside of the project directory and it will use absolute paths... but I don't know why one would want to do that.  Also, I'm not sure that it's strictly-speaking `SRCROOT`—I think I just used the parent folder of the project file-bundle.