Add sprite dropdown for K1 studio say blocks
Remove unused setter
Add note about generating thumbs
Filter out 'hidden' dropdown value from random lists. Add some comments. Parameterize sprite dropdown thumbnail image width/height.
Re-add planned variable
Remove reference to unused setter
Add dropdowns for move blocks and when touching blocks
Add image dropdown for show/hide k1 sprite button. Fix random selection.
Imported from blockly-core
Add image dropdown for background
Add image dropdown for set sprite emotion
Fix jslint warnings
Use underscore without. Make FieldDropdown.getOptions public.
Remove special case for witch sprite
Merge pull request #632 from code-dot-org/studio_k1_blocks

[WIP] Studio k1 blocks
Imported from blockly-core
initial wordsearch work
code review feedback
start writing tests
make WordSearch a class, similar to Bee