kurt.scratch14: remove underscore function name prefixes
Scratch 2 commands: use single quotes
Scratch 2 commands: rename
Scratch 2 commands: formatting
scratch20: build block commands from source
Start Insert class
Remove kurt.scripts alias
BlockTypes, TranslatedBlockTypes
Start BlockType merging
Make TranslatedBlockType
Add TranslatedBlockType.make_default
Move plugin imports to end of file for sanity
BaseBlockType
Remove BlockType.make_default as superfluous