Make level 3 required Say block require actor #2 (index 1)
- Add utility for constructing "Say [sprite]" required block
Make level 3 required Say block require hello() text
- Require non-default text for level 7
Make level 15 require "Ouch!" and actor 1 (index 0)
- Add localized "Ouch!" string
Make level 14 require 'hello'
- Make sprite option optional in required block constructor
Fix jshint errors
Add comment explaining saySpriteRequiredBlock
Merge pull request #769 from code-dot-org/studio_level_bugs

Studio level "say" requirement bugs [finishes #75239858]