Add basic documentation to the program.
Add rdoc generator to Rakefile + update gemspec

html directory (where rdoc was generated) added to .gitignore as well
Add more RDoc documentation to dice.rb
tab in gemspec likely shouldn't be there
update README
fix up readme more
add rspec to Rakefile
add guard and modules to Gemfile
rubocop and guard module
add initial Guardfile
rubocop offenses fixed + spork added to cucmber + guard file tweaked
remove Spork, not needed
add dice spec + change name of dice's sides feature to faces
travis now runs rspec tests