Make writing docs easier (for non-tech/ember people)

At the moment, writing pages for ec-addon-docs that requires you to do the following:

• Find tests/dummy/app folder
• Create a route in tests/dummy/app/router.js
• Create the respective my-route.md (or my-route/template.md) file
• Possibly create a section/template.hbs for the layout of a new section

This is not hard to do for us ember folks but if other people (e.g. designers) jump in and want to provide texts they probably have a hard time doing so (just try to remember that cryptic folder path to the dummy app might be exhausting enough). There should be an easier way. An easy shot might be the following (a little jekyll inspired):

• Leverage the docs/ root folder
• People will use folders inside for different sections
• They will only write markdown
• Markdown contains a front matter (delimited via --)
• Front Matter contains meta data (e.g. layout)
• e.g. layout is predefined by a developer and maps to the respetice section/template.hbs
• docs/ folder has some "magic" meta files (starting with underscore). Those meta files will provide navigation for various sections

An example:

- docs
  - sandbox
    - _nav.md
    - index.md
    - quick-start.md

The docs folder can be watched and will be hoisted/mapped into the dummy app, creating routes on the fly =) (can be optimized on release)

Xem xét luồng hiện tại qua tests/dummy/app, đặc biệt là router.js, các tệp Markdown của route và section/template.hbs. Xác định cách một cây docs/, front matter, các tệp _nav.md và những thay đổi được theo dõi sẽ được ánh xạ vào ứng dụng dummy; hoàn thành nghĩa là contributors có thể viết Markdown mà không phải tự tạo các route hoặc template Ember.