README.md: update words
swagger: instead of defining swagger_path_prefix, just pass it

since we only need that information at the time we mount swagger,
it's not really belonging to the app.
swagger: use dispatch and do not add cors headers by default

remove Access-Control-Allow-Origin by default
non-existing paths should have empty result instead of crashing
it's notes, not note
call swagger_apiVersion instead of hard coding version
path could simply be root! (/)
strip anchors (^$)
url map expects SCRIPT_NAME exists
README.md: update accordingly (and add swagger)
we don't need the path for query parameters
make sure the name is a string
swagger test added
bump gemspec
update release note