use absolute url for canonical target
make canonical target of path without query string
sqm: temp
extract canonical to rack app and refactor tests and code for url rack-app
Merge branch 'fix/canonical' of github.com:learnjin/rewritten into fix/canonical

Conflicts:
	lib/rack/url.rb
	lib/rewritten.rb
	test/rack/rewritten_url_test.rb
add travis.yml
vesion bump and history update
Merge branch 'fix/canonical'
fixed canonical rack app for non-200 responses
version bump
Merge branch 'fix/non-200-canonical'