LICENSE.txt: Updated the copyright years.

DavidEGrayson · DavidEGrayson · commit 95a6a5224476 · 2017-07-14T20:37:18.000-07:00
diff --git a/LICENSE.txt b/LICENSE.txt
@@ -1,4 +1,4 @@
-Copyright (c) 2015 Pololu Corporation.  For more information, see
+Copyright (c) 2015-2017 Pololu Corporation.  For more information, see
 
 http://www.pololu.com/
 http://forum.pololu.com/

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-Copyright (c) 2015 Pololu Corporation. For more information, see`
	`1`	`+Copyright (c) 2015-2017 Pololu Corporation. For more information, see`
`2`	`2`
`3`	`3`	`http://www.pololu.com/`
`4`	`4`	`http://forum.pololu.com/`