[feature fix] Webpack fixes

Fixes a couple webpack-related errors on the registration and view file pages.

Moves all JS code to the bottom of page so that modules are loaded after the webpack runtime (in `vendor.bundle.js`) is loaded.

Renames `osf-helpers`, `ko-helpers`, `osf-language`, and `dropzone-patch` to be more consistent with the conventions documented here: http://cosdev.readthedocs.org/en/latest/style_guides/javascript.html#writing-modules-in-the-osf