add opgl

dongjinlong · dongjinlong · commit a4a9a01c6a9b · 2016-09-14T18:52:08.000+08:00
diff --git a/readme.txt b/readme.txt
@@ -1,2 +1,2 @@
 Git is a distributed version control system.
-Git is free software.
+Git is free software under the GPL.

Original file line number	Diff line number	Diff line change
`@@ -1,2 +1,2 @@`
`1`	`1`	`Git is a distributed version control system.`
`2`		`-Git is free software.`
	`2`	`+Git is free software under the GPL.`