Add Overleaf (#523)

* Add overleaf SVG

* Add Overleaf to README

* Add overleaf reference svg

* Cite CoreUI for Overleaf

* Add reference comparison

* Create overleaf.xml

* Fix overleaf Android vector

* Linebreaks for readability.

Co-authored-by: Terence Eden <edent@users.noreply.github.com>

README.md

@@ -223,6 +223,7 @@ Say thanks!
 <td>BitBucket<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/bitbucket.svg" width="125" title="BitBucket"/><br>681 Bytes</td>
 <td>Etsy<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/etsy.svg" width="125" title="Etsy"/><br>538 Bytes</td>
 <td>Intercom<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/intercom.svg" width="125" title="Intercom"/><br>839 Bytes</td>
+<td>Overleaf<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/overleaf.svg" width="125" title="Intercom"/><br>452 Bytes</td>
 </tr>
 </table>
 
@@ -657,6 +658,7 @@ The majority of these vector logos are based on someone else's work.
 - [Plex](https://github.com/plexinc/plex-media-player/blob/master/resources/images/icon.svg) - GPLv2
 - [NHS](https://www.england.nhs.uk/nhsidentity/identity-guidelines/nhs-logo/)
 - [Threema.](https://threema.ch/de/press)
+- [CoreUI](https://github.com/coreui/coreui-icons) - CC-BY
 
 From [SVGporn](https://github.com/gilbarbara/logos/) - CC0
 

images/android-vector-drawable/overleaf.xml

@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="512dp"
+    android:height="512dp"
+    android:viewportWidth="512"
+    android:viewportHeight="512">
+  <path
+      android:fillColor="#fff"
+      android:pathData="M 15 0 L 497 0 Q 512 0 512 15 L 512 497 Q 512 512 497 512 L 15 512 Q 0 512 0 497 L 0 15 Q 0 0 15 0 Z" />
+  <path
+      android:pathData="M118 304c0 41 23 79 60 99 37 19 81 17 115-7 34-23 52-64 47-105s-32-76-71-91c-13-5-26-8-40-7.5-24 16-44 39-56 65 41-43 99-30 123 16 21 52-16 103-67 104-54-2.7-85-55-77-100 14-86 117-135 193-154-35 17-69 36-101 58 92 35 107-42 149-76-43-17-197-25-198 68-44 28-75 72-77 130z"
+      android:fillColor="#46a247"
+</vector>

images/reference/index.md

@@ -267,3 +267,4 @@ Where possible this links to the organisation's brand guidelines page.
 | <img src="/images/svg/etsy.svg" width="256" /> | <img src="/images/reference/etsy.png" width="256" /> | https://www.etsy.com/uk/press?ref=ftr |
 | <img src="/images/svg/foobar2000.svg" width="256" /> | <img src="/images/reference/foobar2000.jpg" width="256" /> | https://www.foobar2000.org/ |
 | <img src="/images/svg/intercom.svg" width="256" /> | <img src="/images/reference/intercom.svg" width="256" /> | https://www.intercom.com/press |
+| <img src="/images/svg/overleaf.svg" width="256" /> | <img src="/images/reference/overleaf.svg" width="256" /> | https://www.overleaf.com/for/partners/logos |

images/reference/overleaf.svg

@@ -0,0 +1 @@
+<svg id="Layer_1" data-name="Layer 1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 841.89 852.62"><defs><mask id="mask" x="174.51" y="91.03" width="1280.35" height="670.56" maskUnits="userSpaceOnUse"><g id="b"><path id="a" d="M1454.86,761.33H174.77V91H1454.86Z" fill="#fff"/></g></mask></defs><title>stickers alt</title><g mask="url(#mask)"><path d="M753,112C662.45,76.7,334.23,63.65,333.68,259.49,237.92,320.8,174.51,420.79,174.51,527.67c0,129.22,104.74,233.91,234,233.91s234-104.74,234-233.91A233.93,233.93,0,0,0,491.82,309c-16.94-6.55-53.74-18.1-83.13-15.62-41.93,26.66-93.06,81.47-117.24,136.06,35.94-43.13,92.12-62,141.88-53.91A154.17,154.17,0,0,1,562.54,527.63c0,85.15-69.31,154.12-154.46,154.12a153.66,153.66,0,0,1-117.24-54c-41.5-48.86-52.2-101.83-43.64-153.6C276.77,292.65,492,189.4,652,149.74c-52.2,27.64-146.33,73-212.22,122.5C631.9,346.43,663,184.44,753,112Z" fill="#47a141"/></g></svg>

images/svg/overleaf.svg

@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+aria-label="Overleaf" role="img"
+viewBox="0 0 512 512"><rect
+width="512" height="512"
+rx="15%"
+fill="#fff"/><path d="M118 304c0 41 23 79 60 99 37 19 81 17 115-7 34-23 52-64 47-105s-32-76-71-91c-13-5-26-8-40-7.5-24 16-44 39-56 65 41-43 99-30 123 16 21 52-16 103-67 104-54-2.7-85-55-77-100 14-86 117-135 193-154-35 17-69 36-101 58 92 35 107-42 149-76-43-17-197-25-198 68-44 28-75 72-77 130z" fill="#46a247"/></svg>