Our deploys are complaining about how many times we set `user.name` and are failing.

Prune gh-pages to match our branch list after each build

Update scratch-svg-renderer to the latest version 

Move context menus for monitors outside of the document flow.

Fixes integration test which was failing trying to use the context menu

Stage size toggle

Also break up find command into multiple lines

Update scratch-blocks to the latest version 

Base everything on the $repository variable

Update scratch-blocks to the latest version 

Also update for Travis use.

Update scratch-blocks to the latest version 

chore(package): update scratch-l10n to version 3.0.20180611175036

Update scratch-audio to the latest version 

Update scratch-storage to the latest version 

It's failing in CI for reasons we don't yet understand

Also remove some obsolete code

Pass a `stageSize` property down from a centralized `MediaQuery` in the
GUI component, and control the size of the stage and all surrounding
elements based on that value. Note that this is a pure property and is
not stored in the Redux state, since we gain access to the results of
the media query during `render()` and we shouldn't change Redux state
during `render()`.

Some stage-adjacent elements don't yet react correctly to the smallest
stage size.