Updates Nimble-Snapshots submodule.
Updated images.
Submodule update.
Merge pull request #77 from AshFurrow/submodule-update

@1aurabrown => Submodule update
Added more safety.
Merge pull request #78 from AshFurrow/safety-dance

@1aurarown => Added more safety.
Merge remote-tracking branch 'artsy/master' into mainscreen-contents