Added docs status table

docs/internals/translation-status.md

+Documentation status
+--------------------
+
+File                                | Ready for transltion
+------------------------------------|---------------------
+README.md                           | Yes
+intro-yii.md                        | Yes
+intro-upgrade-from-v1.md            | Yes
+start-installation.md               | Yes
+start-workflow.md                   | Yes
+start-hello.md                      | Yes
+start-forms.md                      | Yes
+start-databases.md                  | Yes
+start-gii.md                        | Yes
+start-looking-head.md               | Yes
+structure-overview.md               | Yes
+structure-entry-scripts.md          | Yes
+structure-applications.md           | Yes
+structure-application-components.md | Yes
+structure-controllers.md            | Yes
+structure-views.md                  |
+structure-models.md                 | Yes
+structure-filters.md                |
+structure-widgets.md                |
+structure-modules.md                |
+structure-assets.md                 |
+structure-extensions.md             |
+runtime-bootstrapping.md            |
+runtime-routing.md                  |
+runtime-requests.md                 |
+runtime-responses.md                |
+runtime-sessions-cookies.md         |
+runtime-url-handling.md             |
+runtime-handling-errors.md          |
+runtime-logging.md                  |
+concept-components.md               | Yes
+concept-properties.md               | Yes
+concept-events.md                   | Yes
+concept-behaviors.md                | Yes
+concept-configurations.md           | Yes
+concept-aliases.md                  | Yes
+concept-autoloading.md              | Yes
+concept-service-locator.md          | Yes
+concept-di-container.md             | Yes
+db-dao.md                           |
+db-query-builder.md                 |
+db-active-record.md                 |
+db-migrations.md                    |
+db-sphinx.md                        |
+db-redis.md                         |
+db-mongodb.md                       |
+db-elastic-search.md                |
+input-forms.md                      |
+input-validation.md                 | Yes
+input-file-uploading.md             |
+input-multiple-models.md            |
+output-formatting.md                |
+output-pagination.md                |
+output-sorting.md                   |
+output-data-providers.md            |
+output-data-widgets.md              |
+output-theming.md                   |
+security-authentication.md          |
+security-authorization.md           |
+security-passwords.md               |
+security-auth-clients.md            |
+security-best-practices.md          |
+caching-overview.md                 | Yes
+caching-data.md                     | Yes
+caching-fragment.md                 | Yes
+caching-page.md                     | Yes
+caching-http.md                     | Yes
+rest-quick-start.md                 | Yes
+rest-resources.md                   | Yes
+rest-controllers.md                 | Yes
+rest-routing.md                     | Yes
+rest-response-formatting.md         | Yes
+rest-authentication.md              | Yes
+rest-rate-limiting.md               | Yes
+rest-versioning.md                  | Yes
+rest-error-handling.md              | Yes
+tool-debugger.md                    |
+tool-gii.md                         |
+tool-api-doc.md                     |
+test-overview.md                    |
+test-unit.md                        |
+test-functional.md                  |
+test-acceptance.md                  |
+test-fixtures.md                    |
+extend-creating-extensions.md       |
+extend-customizing-core.md          |
+extend-using-libs.md                |
+extend-embedding-in-others.md       |
+extend-using-v1-v2.md               |
+extend-using-composer.md            |
+tutorial-advanced-app.md            |
+tutorial-start-from-scratch.md      |
+tutorial-console.md                 |
+tutorial-i18n.md                    |
+tutorial-mailing.md                 |
+tutorial-performance-tuning.md      |
+tutorial-shared-hosting.md          |
+tutorial-template-engines.md        |
+tutorial-core-validators.md         | Yes
+bootstrap-widgets.md                |
+jui-widgets.md                      |
+helper-overview.md                  |
+helper-array.md                     |
+helper-html.md                      |
+helper-url.md                       |
+helper-security.md                  |
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