Update version for development
Provide proper `to_hash` conversion
Add support for passing data into struct
Provide `#_build` method helper for passing blocks intended for evaluation
Include `#build` helper method
Add support for `:value_collapse` state to allow stacked value assignments
Add helper bang aliases. Update docs from rdoc to yard
Ensure init hash is optional and load if provided
Update versions for release 0.2.0
Add static files
Include license line