When scale is 1, add the `img-fluid` class
and re-set the base image size.

This way, the image can better respond to window resizes

This component is intended to be the
UI entry point for scaling/zooming a design.

It emits a @scale event, and holds the increment
and constraint logic for updating scale

This commit removes { sync: false } accross entire codebase
This is useless since upgrade to @vue/test-utils 1.0.0.beta-30

- persisted version as router query parameter;
- implemented errors on incorrect version;
- refactored mixins to separate versions from project

- changed image overlay
- created components for discussion and notes
- added tests
- refactored GraphQL queries structure