Add Gitea icon (#310)

* Add reference image for Drone

* Add icon for Drone

* Add Drone to reference/index.md

* Update README.md

* Add Gitea SVG

* Add Gitea reference image

* Add Gitea to Readme

* Add Gitea to reference/index.md

* Fix alignment for Gitea icon

* Revert "Add reference image for Drone"

This reverts commit 5890c6c.

* Revert "Add icon for Drone"

This reverts commit fafb541.

* Revert reference/index.md

* Revert README.md

README.md

@@ -321,6 +321,7 @@ Say thanks!
 <td>Vue<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/vue.svg" width="125" title="Vue" /><br>286 Bytes</td>
 <td>Gradle<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/gradle.svg" width="125" title="Gradle" /><br>743 Bytes</td>
 <td>Amber<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/amberframework.svg" width="125" title="Amber Framework" /><br>754 Bytes</td>
+<td>Gitea<br><img src="images/svg/gitea.svg" width="125" title="Gitea" /><br>930 Bytes</td>
 <td>Drone.io<br><img src="images/svg/drone.svg" width="125" title="Drone.io" /><br>503 Bytes</td>
 <td>Ruby Gems<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/rubygems.svg" width="125" title="Ruby Gems" /><br>402 Bytes</td>
 </tr>

images/reference/index.md

@@ -190,5 +190,6 @@ Where possible this links to the organisation's brand guidelines page.
 | <img src="/images/svg/gojek.svg" width="256"/> | <img src="/images/reference/gojek.svg" width="256" /> | https://www.gojek.com/id/terms-of-service/ |
 | <img src="/images/svg/luckyframework.svg" width="256"/> | <img src="/images/reference/luckyframework.svg" width="256" /> | https://luckyframework.org/ |
 | <img src="/images/svg/grafana.svg" width="256"/> | <img src="/images/reference/grafana.svg" width="256"/> | https://github.com/grafana/grafana/blob/master/public/img/grafana\_icon.svg |
+| <img src="/images/svg/gitea.svg" width="256"/> | <img src="/images/reference/gitea.png" width="256"/> | https://github.com/go-gitea/gitea/tree/master/assets |
 | <img src="/images/svg/drone.svg" width="256"/> | <img src="/images/reference/drone.png" width="256"/> | https://github.com/drone/brand |
 | <img src="/images/svg/rubygems.svg" width="256"/> | <img src="/images/reference/rubygems.png" width="256"/> | https://rubygems.org |