Added contributor credit.

Docs/Urho3D.dox

@@ -121,6 +121,7 @@ Urho3D development, contributions and bugfixes by:
 - skaiware
 - szamq
 - thebluefish
+- yushli
 
 Urho3D is greatly inspired by OGRE (http://www.ogre3d.org/) and Horde3D (http://www.horde3d.org/). Additional inspiration & research used:
 

README.md

@@ -73,6 +73,7 @@ Urho3D development, contributions and bugfixes by:
 - skaiware
 - szamq
 - thebluefish
+- yushli
 
 Urho3D is greatly inspired by OGRE (http://www.ogre3d.org) and Horde3D
 (http://www.horde3d.org). Additional inspiration & research used: