update(doc):updated changelog and version

Release/5.3.0 (#198)

* Version update

* New changelog

* Readme update + docs in Theme

* Added theming to camera/local files fragments

* Readme update

5.2.0 release

5.1.0 release

fix local sources crash

broaden local uploads, notification and upload bug fixes

Fix several UI and multi-item upload bugs

complete rewrite and update