Fixes backend change for dataset progress

v0.5.3

remove references to remotedataset progress

Handle download of export without public access tokens.

Pull images with API keys when token is missing (#89)

* Pull images with API keys when token is missing

* added option during export for token

* bump version number

Co-authored-by: Simon Edwardsson <simon.edwardsson@gmail.com>

Complex polygon support for pytorch and coco export

v0.5.1

Merge branch 'coco-rle'