Deprecate imports from ./page-object

[ro0gr]

In the docs we still can see an old style of imports from the test-support directory:

import { findElement } from './page-object';

I think it's a good time to notify users about the recommended way to import

import { findElement } from 'ember-cli-page-object';

and to get rid of old style in the v2.0.

This issue is complementary to #359