add codeclimate badge to readme
add license to gemspec and modify License file to match that recommended by github
bump version & changelog
some necessary newlines for local redcarpet
add newlines rule to editorconfig
update rubies list for travis
update rspec dep, remove autotest
switch all quotes in gemspec to be the same
tabs => spaces
reorg spec directory
add a Convert module with class level methods for slug & string

we want to be able to use this library without polluting any method spaces