add Ingredients
add Ingredient class
add Ingredient test
add Step test and notes
add Step
make default unit grams again
remove junk
pass ingredients and weight
add total_flours
generalize total_N
remove Formuala
change bp_type to type
clean up spec
rename bp to bakers_percentage
bakers_percent_100 as alias
remove blanks
factor out test befores
question for Renée
tidy define_methods
remove #!