add sequencer.importString()

[jywarren]

This is a small one but we can now use this code:

https://github.com/tech4GT/image-sequencer/blob/ac183205f0e30015d1c273359e2d6ee7cede7538/examples/lib/defaultHtmlSequencerUi.js#L17-L20

as a built-in sequencer function called importString(), right?

[jywarren]

GitMate.io thinks possibly related issues are #250 (Add step.toString() and sequencer.toString() methods), #157 (Add a Contrast module), #138 (Add a Dithering module), #113 (Add a Brightness module), and #158 (Add a Saturation Module).

[tech4GT]

@jywarren Exactly!!

[jywarren]

Awesome. I also reorganized the milestone order a bit reflecting some of our new smaller issues and recent progress. Great work this week, Varun!

https://github.com/publiclab/image-sequencer/milestone/2