Add logo back
Correct font-awesome weirdness in admin backend

Icons for edit + delete links were incorrectly positioned and admin navbar text was very thin
Add option_values to variant template [api]

Fixes #3460
[api] Passing no parameters to ShipmentsController#update should not make it 500
Added :user at :tab was missing in I18N

Fixes #3455
Move font-awesome into app/assets for scss import. Fixes #3465
Fix `load_sample`

Broke after 7a5e43662c57807dafaebf8160069e4de8f1c855 which requires
product to have a shipping category

Add build for spree/sample load data task
Add Sample to build.sh