reMarkable tablet

Add a simple way to add extra video filters to ffplay. I propose -e | --extra-filters which would set the next argument as the initial value for video_filters.

One use case for this would be to invert the video (see issue #69).

Currently the library depends on guzzle which is pretty popular, but other projects might already use a different HTTP client. Would be nice to switch it to https://github.com/php-http/httplug

Woops! Sorry for that, and thank you for catching it! I meant to type continue there but I slipped. Testing the codebase on the demo directory did not raise problems so I went along.

No promises here, but would you be open to PRs related to building an integration test suites? Such regressions could be caught pretty easily with basic tests.

_Originally posted by @clement-elbaz in ht

Some RSS feeds, twitter accounts, and other providers don't update every day. In addition to the current numerical limit: int arguments passed to StoryProviders, it would be very useful to have a since: datetime.datetime argument that filters stories by publication date.

Screenshots should be stored into xochitl by default. Likely in a Screenshots folder. The folder should be configurable, as well as if the feature should be enabled or not.