Remove duplicate include
Make sure view-file-page.js is loaded at the bottom of the page
Don't need to include metadata_1.js in webpack config

It is a reuseable module used by register_1-page.js
Include file-detail.js on bottom of page for all addons

Fixes webpack error
Rename osf-helpers, ko-helpers, addon-helpers, osf-language

For better naming consistency with the conventions in COSDev
Remove repeated addon widget includes
Merge branch 'feature/commonjs-fixes' into develop