The installation instructions in the README don't match with what's in the cloud9 repo. The README is 3 years old so I assume it's out of date.

In particular,

1. it's not clear where in the c9sdk/configs/standalone.js file to add this to:

   {
      packagePath: "./c9.ide.theme.jett/build-theme",
      pathRoot: __dirname
   }
   

2. I don't have a `c9sdk/configs/cli