v2.9.1
Changed markdownRender to be passed plaintext MD. Forgot-to-render check is now done at send time rather than periodically. Made new HTML-to-text code also take a range. Test cases need updating.
Made Chrome upgrade notification less aggressive. Refactored get-notification-html code in Chrome and Firefox.
Instead of getting the options every time before the forgot-to-render interval check, now just doing it once. Hopefully this helps with the memory leak of #108 and the error messages of #113.