Add references to Weblate, cross reference DEVELOPING.md with CONTRIBUTING.md.

Author: michaelrsweet

CONTRIBUTING.md

@@ -2,9 +2,17 @@ Contributing to CUPS
 ====================
 
 CUPS is developed by OpenPrinting and distributed as open source software under
-the Apache License, Version 2.0 with exceptions to allow linking to GPL2/LGPL2
-code.
+the Apache License, Version 2.0 with (optional) exceptions to allow linking to
+GPL2/LGPL2 code.
 
-Contributions should be submitted either as pull requests or as attachments
-(unified diffs) to bug reports on the OpenPrinting CUPS Github project at
-<https://github.com/openprinting/cups>.
+Please see the [Developing for CUPS](DEVELOPING.md) file for information about
+the coding style and other project guidelines before submitting your
+contributions.
+
+Code contributions should be submitted either as pull requests or as attachments
+(unified diffs) to bug reports on the OpenPrinting libcups Github project at
+<https://github.com/openprinting/libcups>.
+
+Translations can be submitted as pull requests or via [Weblate][WL].
+
+[WL]: https://hosted.weblate.org

README.md

@@ -82,6 +82,22 @@ pages and other documentation in the `doc` directory.
 *Please read the documentation before asking questions.*
 
 
+Contributing Code and Translations
+----------------------------------
+
+Code contributions should be submitted as pull requests on the Github site:
+
+    http://github.com/OpenPrinting/libcups/pulls
+
+See the file `CONTRIBUTING.md` for more details.
+
+CUPS uses [Weblate][WL] to manage the localization of the command-line programs
+and common IPP attributes and values, and those likewise end up as pull requests
+on Github.
+
+[WL]: https://hosted.weblate.org
+
+
 Legal Stuff
 -----------