"Open from URL" can't open url contain Chinese char， 404 error code #231
Description
"Open from URL" can't open url contain Chinese char, example: "https://raw.github.com/kiwik/kiwik.github.io/master/_posts/2013-12-11-Pycharm%E7%9A%84%E8%BF%9C%E7%A8%8B%E4%BB%A3%E7%A0%81%E7%BC%96%E8%BE%91.md"
this URL can be opened in firefox and chrome directly, but can't be opened by stackedit，error 404 return
<html><body><h1>400 Bad request</h1>
Your browser sent an invalid request.
</body></html>I'm sorry, my english is bad, but I love stackedit :)