Migrate to stackedit plus

[moookino]

Hey @qdm12
Thanks for your great work. I found that original project is kind a dead and there's active fork https://stackedit.net/app# https://github.com/mafgwo/stackedit-plus which has really big image size compared to yours.
Do you think you can improve it and let us have smaller and faster image for this application?

Thanks in advance