Properly download and load fit.js

Is this the right fix?

Without this patch, I'm getting:

Error: ENOENT, no such file or directory '/net/anie/local/moy/dev/dahu-next/dahu/core/app/components/fit.js'
In module tree:
    dahuapp
      controller/workspaceLayout
        views/workspace/screen

Adding fit to bower.json ensures that the dependancy is downloaded, but
the path in dahuapp.js was wrong, so fix it too.