Merge branch 'blueprints'

PR #1057

* blueprints:
  Update changelog with latest features
  Add feature opt in test through CLI layer
  Fix linting error for line spacing
  Update docs with a link to GH issues
  Move error message to constant
  Change link from rst to html
  Add documentation for feature flags
  Add support for experimental features
  Remove unused params in Blueprint
  Add API docs for blueprints
  Add test to verify blueprint has all decorators
  Clarify comment on taking kwargs in the route decorator
  Remove unused kwargs param
  Map lambda context to blueprint
  Update pyi file to be consistent with app.py
  Add support for blueprints

CHANGELOG.rst

@@ -9,6 +9,10 @@ Next Release (TBD)
   (`#1047 <https://github.com/aws/chalice/pull/1047>`__)
 * Add support for passing SNS ARNs to ``on_sns_message``
   (`#1048 <https://github.com/aws/chalice/pull/1048>`__)
+* Add support for Blueprints
+  (`#1023 <https://github.com/aws/chalice/pull/1023>`__)
+* Add support for opting-in to experimental features
+  (`#1053 <https://github.com/aws/chalice/pull/1053>`__)
 
 
 1.6.2

chalice/__init__.py

@@ -1,4 +1,4 @@
-from chalice.app import Chalice
+from chalice.app import Chalice, Blueprint
 from chalice.app import (
     ChaliceViewError, BadRequestError, UnauthorizedError, ForbiddenError,
     NotFoundError, ConflictError, TooManyRequestsError, Response, CORSConfig,