Beginnings of addendum documents.
Working addendum document, with extensions to send().
Resolve merge conflict with upstream.
Add top-level class name override.
Merge branch 'api-addendum' of github.com:alxhub/streamy-dart into api-addendum
Merge branch 'master' into api-addendum

Conflicts:
	test/all_tests.dart
Patch request template to generate cleaner code.
Merge pull request #8 from alxhub/api-addendum

The beginning of "addendum" documents which extend discovery data. The first use case is to add custom named parameters to send(), which get translated into local values in the Request.