v2.0.0-beta.12 fixes several discovery issues

* get-client-lib works properly again (broken by the local discovery
  change)
* add namespace information to discovery docs
* fix path parameter ordering
* fix API root in discovery doc output
* add "body" as name for body parameter in OpenAPI request bodies

v2.0.0-beta.11 renames get-swagger-doc

* get-swagger-doc is now get-openapi-doc.

v2.0.0-beta.10 adds some big changes and fixes

* fix audience modeling from annotations
* refactor framework to use TypeToken over reflect.Type
* add OpenAPI resource modeling
* add local discovery document generation
* fix incompatibility with empty collection checking from 1.0 framework

v2.0.0-beta.8 adds some new features and fixes:

* add method and parameter level descriptions to annotations
* add customizable reason and domain to ServiceException
* support X-HTTP-Method-Override header
* fix Windows build
* add legacy https://accounts.google.com issuer
* Fix the header response in UnauthorizedException

v2.0.0-beta.8 adds:

* Support for retrieving service class names from web.xml when not specified.

add tag for v2.0.0-beta.7