Paul Woolcock 0c933c1b8c Add `account_id` param to `GET /api/v1/notifications` ()
* Add `from_account` to notifications API

this adds the ability to filter notifications by the account they
originated from

* passing a non-existent user should cause none to be returned

* Fix codeclimate warnings

* fix more codeclimate warnings

* make requested changes:

* use account id instead of user@domain
* name the param `account_id` instead of `from_account`

* Don't use `return` in a lambda
..
v1 Add `account_id` param to `GET /api/v1/notifications` ()
v2 Add more granular OAuth scopes ()
web Lint pass ()
base_controller_spec.rb Use raw status code on have_http_status ()
oembed_controller_spec.rb Use raw status code on have_http_status ()
proofs_controller_spec.rb Add Keybase integration ()
push_controller_spec.rb Use raw status code on have_http_status ()
salmon_controller_spec.rb rubocop issues - Cleaning up ()
subscriptions_controller_spec.rb rubocop issues - Cleaning up ()