Added author info file and instructions on how to add names to it.

authors.txt

@@ -0,0 +1,8 @@
+Authors of Meson build system
+
+Meson was originally designed and created by Jussi Pakkanen.
+
+
+The following people have submitted patches for the project
+
+Peter Koval

readme.txt

@@ -52,7 +52,8 @@ Contributing
 
 We love community contributions. There are two simple ways to submit your
 patches. The preferred way is to send a github pull request. You can
-also send patches as emails to the Meson mailing list.
+also send patches as emails to the Meson mailing list. Remember to add
+your name to the list of contributors in authors.txt.
 
 
 Further info