Update license

Author: dendenxu

license

@@ -1,16 +1,21 @@
-Copyright 2022-2024 3D Vision Group at the State Key Lab of CAD&CG,  
-Zhejiang University. All Rights Reserved. 
+MIT License
 
-For more information see <https://github.com/dendenxu/fast-gaussian-rasterization> 
-If you use this software, please cite the corresponding publications   
-listed on the above website. 
+Copyright (c) 2024 Zhen Xu
 
-Permission to use, copy, modify and distribute this software and its 
-documentation for educational, research and non-profit purposes only. 
-Any modification based on this work must be open-source and prohibited 
-for commercial use. 
-You must retain, in the source form of any derivative works that you  
-distribute, all copyright, patent, trademark, and attribution notices  
-from the source form of this work. 
- 
-For commercial uses of this software, please send email to [email protected]
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.