slight updates to README
slight updates to README


Former-commit-id: 2e2fc834b76f75abaec26af4ad961dc45212011d [formerly aa722fc54aadb797fc93340237be2c2e09834741]
Former-commit-id: 22082fdc4d6ee57d4c14d5b7e849bd3e241b2c3a
EricLagergren/decimal