Upload photos in the order that they are rendered by the export service.
Retain category, nsfw and license properties when photos are deleted from 500px.
Merge pull request #5 from Mossop/uploadorder

Upload photos in the order that they are rendered by the export service.
Merge pull request #6 from Mossop/keepmetadata

Retain category, nsfw and license properties when photos are deleted from 500px
Make 500px fields searchable and browsable.
Set custom API keys.
Merge branch 'fixes/browsable' into working
Use a web browser to authorize account access.