Added GitLab_CI sensor. (#6255)

* Added GitLab_CI sensor.

* Fixed indentation issue in example config section.

* Fixes to remove unnecessary return in example config section.

* Fixed missing "

* Updates to sensor.gitlab_ci.markdown

Added optional url, updates to include alternate gitlab_id options.

* Updated to next build, added optional name config to match base module.

* Removed blank lines, wording changes, removed scan_interval.

* ⬆️ ha_release

source/_components/sensor.gitlab_ci.markdown

@@ -0,0 +1,54 @@
+---
+layout: page
+title: "GitLab-CI Sensor"
+description: "How to integrate GitLab-CI Job status within Home Assistant."
+date: 2018-09-10 19:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: gitlab.png
+ha_category: Sensor
+ha_release: 0.80
+ha_iot_class: "Cloud Polling"
+---
+
+The GitLab_CI sensor integrates results reported by CI/CD Pipeline Jobs in [GitLab](https://gitlab.com/).
+
+## {% linkable_title Setup %}
+
+You will need a GitLab repository ID. On the "Details" page for your GitLab repo, just below the project name is "Project ID:"
+Alternatively, you can use "{GitLab_Username}/{GitLab_RepositoryName}", ex: "MyCoolUsername/MyCoolRepository"
+
+A GitLab token with at least the API permission scope is needed, which can be created on the [GitLab Personal Access Tokens](https://gitlab.com/profile/personal_access_tokens) page of your GitLab User Settings.
+
+## {% linkable_title Configuration %}
+
+To enable this platform, please add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+  - platform: gitlab_ci
+    gitlab_id: '1234567'
+    token: 'aaaaaaaaaaAAAAAAAAAA'
+```
+
+{% configuration %}
+gitlab_id:
+  description: GitLab repository ID or "username/repository"
+  required: true
+  type: string
+token:
+  description: GitLab API Token
+  required: true
+  type: string
+name:
+  description: Sensor name as it appears in Home Assistant. Defaults to 'GitLab CI Status'.
+  required: false
+  type: string
+url:
+  description: GitLab repository URL. Defaults to 'https://gitlab.com'. Used for self-hosted repositories.
+  required: false
+  type: string
+{% endconfiguration %}