Actix web 1.0.0 beta3

Changes

Added

• Add helper function for executing futures test::block_fn()

Changed

• Extractor configuration could be registered with App::data()
  or with Resource::data() #775

• Route data is unified with app data, Route::data() moved to resource
  level to Resource::data()

• CORS handling without headers #702

• Allow to construct Data instances to avoid double Arc for Send + Sync types.

Fixed

• Fix NormalizePath middleware impl #806

Deleted

• App::data_factory() is deleted.