Update the license and copyright information in README

Author: orhun

README.md

@@ -204,9 +204,8 @@ like MikroC to compile your code (create hex) & flash to PIC.
 
 ## License
 
-GNU General Public License v3. (see [gpl](https://www.gnu.org/licenses/gpl.txt))
+GNU General Public License ([v3](https://www.gnu.org/licenses/gpl.txt))
 
-## Credit
-
-Copyright (C) 2019 by orhun https://www.github.com/orhun
+## Copyright
 
+Copyright (c) 2016-2020, [orhun](https://www.github.com/orhun)