* Ability to set a custom page title via _sidebar.md

* fixes after review

* updated german links
* fixed links where `QingWei-Li` should've been `docsifyjs`
  * naturally excluded donate links and links to private projects like `vuep` unrelated to docsify

---

See commit for details. If you have a question, just ask.

official domain name is changed, which cause the issue. change to use the newest plugin.

Please makes sure these boxes are checked before submitting your PR, thank you!

* [ ] Make sure you are merging your commits to `master` branch.
* [ ] Add some descriptions and refer relative issues for you PR.
* [ ] DO NOT include files inside `lib` directory.

`alias` field should be end with '/' in nginx.conf.
Or nginx server doesn't work.

Please makes sure these boxes are checked before submitting your PR, thank you!

* [x] Make sure you are merging your commits to `master` branch.
* [x] Add some descriptions and refer relative issues for you PR.
* [x] DO NOT include files inside `lib` directory.

Related: #410

This updates urls to marked github repo and documentation.

1. Remove recursive toc outer tag li
2. remove .sidebar li marginLeft
3. add .sidebar ul marginLeft