minor grammer corrections in simple_dice.feature
step 0: add scaffolding for existing cucumber steps
add test code for given dice function

step 1: gotta be hardcore
think using RpgDiceRoller::Dice is better anyway
finish cucumber step 1 - initalizing dice (could use another feature here)
cucumber feature 2 done (intentionally with simple number returned)
finish cucumber steps for simple dice roller, ready to test
Merge branch 'initcucumber' into testing - code there ready for CI