Merge branch 'develop'
Merge development branch retroactively.
added details on use cases
grammar
Merge branch 'develop' of work.github.com:mdsol/dice_bag into feature/beefed_up_description
add myself to the list of contributors
reword after jcarres comment
Merge pull request #66 from mdsol/feature/beefed_up_description

Add explanation of Rails config ERB expansion vs DiceBag expansion.