Add new studio k1 block art
Remove original spritesheets
- Add "Say" icon.
- Fix level reference to "VERY_FAST"
- New artist draw length icons
- Revert to larger arrows for long length draw icons (fits new draw length icons)
- Change k1 "when [collide] actor X actor Y" to "when [collide] X and Y" (shorter)
Add parameter to restrict building to one app
Merge pull request #658 from code-dot-org/new_studio_k1_block_art

Add new studio k1 block art