Dropbox upload plugin uses Public folder and does not create proper share link

[Marco van Hilst]

-- Shutter 0.9.1 ~ Ubuntu 14.04 Trusty
- Affects /shutter/resources/system/upload_plugins/upload/Dropbox.pm

The current Dropbox plugin uses the deprecated Public folder functionality of Dropbox. Dropbox dropped support for the Public folder for free accounts that registered after the drop deadline in favor of individual share link creation.

The current Perl library binding for Dropbox's RESTful HTTP API, Net::Dropbox::API, is old and therefore does not support the new /share and /media functions that generate proper links to the files. Attempting to upload via Dropbox with the plugin in its current state will successfully upload to the Public folder of one's Dropbox, but will yield an invalid link that will display a 404 when opened in a browser.

(I'd suggest switching to WebService::Dropbox, which is more feature-complete, and will propose a merge request for my conversion of the plugin to WebService::Dropbox, if a dev wants to merge it in.)

(Also related to the `Shutter upload` milestone.)

[Marco van Hilst (axiometry)]

Branch merge request submitted-
https://code.launchpad.net/~axiometry/shutter/devel/+merge/228554