RuboCop'd

Changed formatting to Ruby Style. (Except for some longer lines.)
Failure Symbol Probability

Added the probability of seeing a failure symbol.
Added Triumph & Despair
Added Roller & Changed File Name

Added a die roller.
Update README.md

Added readme for Dice Roller
Added Failure & Threat Targets

Also organized the out put a little better.
Readme Updated

Changed comments and read me to show difference in code to do with
Failure and Threat targets.
Simplified to Expanded

Reversed the -S argument and renamed it -X
Merge branch 'master' of https://github.com/Neolitheon/EotE-Dice-Probability