remove wrong slides file
add commit hash to slides
fix code styling for reveal
fix syntax highlighting stylesheet; fix image sizing; add first diff image
bases for formatter examples
move format_results to entirely within Formatter
make class method on Formatter delegate to new instance
factor sweater_attributes out of format_sweater_results*
add sweater and hat examples
move attributes into sweater
switch to Hat#to_formatter_data
consolidate across garment types
get rid of garment
move to polymorphic approach for formatters
hash-assigned polymorphic formatters