save chart as a png#3

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ThomAub wants to merge 2 commits intomasterfrom feature/savepng

+139-4

Commits on Apr 30, 2020

:sparkless: use headless firefow with fantocinni to save the plot. only support for firefox and png at the moment
ThomAub
committed

Commits on May 5, 2020

:refactor: move creation of webdriver and client to seperate functions with and used crate retry to handle the retry loop. Now use DataUrl to parse url content. Added save_png as a new example and …
ThomAub
committed