Publish develop builds to NPM

Update scratch paint

Add missing vector sprites and costumes to libraries

Update scratch-blocks (flyout bottom padding)

Fix monitor scaling, positioning and draggability in fullscreen mode

Specifically in 2.0:
- Monitors cannot be dragged in fullscreen/player
- List monitors cannot be resized, have items added using the button or have their values edited.
- Slider monitors still work.

Don’t load null project id

Replace white rectangle bitmap with empty svg for default backdrop

Only call updateProject to load the project if there is a project id, or it’s the default project id.

Project loader refactor

- better split of hash-parser/project-loader unit tests.

Interact with blocks categories by id instead of by name

Update scratch-svg-renderer to fix IE11

Add missing quotes to .babelrc configuration

chore(package): update scratch-paint to version 0.2.0-prerelease.2018…

Closes #1949

Update scratch-render to get the babel-built version of fonts

Add instructions to PR template browser coverage section

remove question event listener on stage unmount

Fix linting errors from eslint-plugin-react

Update scratch render again to fix speech bubbles again