Switch to Ember-Orbit for managing data sources

Client changes:

• Data sources: Memory and JSON API are connected with api find method assisting memory find
• Non authenticated routes use slug for URLs, admin (edit) routes use ids

Server changes:

• API uses links for JSON API compliance, see http://jsonapi.org
• Server uses content type "application/json-patch+json", see: http://tools.ietf.org/html/rfc6902
• API route for GET /posts/[:id[,id...]|:slug] supports id, slug or comma separated ids

Minor patch of ember-cli version

v3.1.1

Update README.md

Switched to ember-cli for building client application

Merge pull request #2 from pixelhandler/switch-to-ember-cli

Switch from brunch build to ember-cli

3rd generation of my blog

• This is the release prior to switching to ember-cli from brunch.io