added XING (#114)

* added XING

* removed xml declaration

* ran through svgo

images/reference/index.md

@@ -85,5 +85,6 @@ Where possible this links to the organisation's brand guidelines page.
 | <img src="/images/svg/twilio.svg" width="256" />	| <img src="/images/reference/twilio.svg" width="256" />	| https://www.twilio.com/marketing/bundles/company-brand/resources/Twilio-Logos.zip	|
 | <img src="/images/svg/laravel.svg" width="256" />	| <img src="/images/reference/laravel.svg" width="256" />	| https://github.com/laravel/art/blob/master/Laravel-l-slant.svg	|
 | <img src="/images/svg/plex.svg" width="256" />	| <img src="/images/reference/plex.svg" width="256" />	| http://brand.plex.tv/d/qxmJ3odkK0fj/plex-style-guide	|
+| <img src="/images/svg/xing.svg" width="256" />	| <img src="/images/reference/xing.png" width="256" />	| https://dev.xing.com/logo_rules |
 
 

images/svg/xing.svg

@@ -0,0 +1 @@
+<svg viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg" aria-label="Xing"><rect rx="76.8" height="512" width="512" fill="#077"/><path d="M131.12 156.98l36.254 60.251c.127.202.15.498.008.763l-54.198 94.23c-4.11 6.424-1.06 11.072 3.092 11.134l57.594-.084c3.012.08 3.99-.552 5.876-3.58l57.31-98.822c.2-.415.251-1.01.002-1.433l-39.682-64.06c-.846-1.669-1.565-3.04-2.523-3.989-.957-.948-2.153-1.471-3.954-1.443l-55.44-.39c-3.44.616-5.023 3.88-4.33 7.422zM348.23 82.719c-5.709.09-7.657 2.398-10.305 6.252l-112.63 198.39c-.325.592-.355 1.418-.016 2.076l74.703 132.57c1.788 3.386 3.791 4.403 8.084 4.413l54.384-.398c5.32.05 7.645-3.512 4.948-8.66l-74.21-128.02 112.57-199.78c2.035-3.45-1.017-6.796-4.948-6.803z" fill-rule="evenodd" fill="#fff"/></svg>