Start of docs (Twitter data structures)

 On branch docs

	new file:   docs/twitter_data_structs/user_stream.md
Update user stream docs.

 On branch docs

	modified:   docs/twitter_data_structs/user_stream.md
Manage script and test setup.

 On branch testing

	modified:   README.md
	new file:   manage.sh
	modified:   package.json
	new file:   test/smoke_test.js
Merge pull request #1 from kixxauth/docs

Docs for Twitter API structs
Merge pull request #2 from kixxauth/testing

Manage script and test setup.
URLFilter stream filters only updates with URLs

 On branch url_filter

	new file:   lib/url_filter.js
	new file:   test/fixtures/twitter/update_with_url.json
	new file:   test/fixtures/twitter/update_without_url.json
	deleted:    test/smoke_test.js
	new file:   test/url_filter_test.js