show baker's percentage
test recipe weight
add (pending) test to simplify getting bp
tidy method name bakers_100_percent
pending test
rearrange gem style
add readme
add gemspec
add Rakefile
update spec to gem directory structure
optional args to Recipe
on-the fly totals methods
add pending pretty print test
add pending recipe_to_formula test
stub method Recipe.formula
remove duplicative tests
make Formula start to look like Recipe, and notes