Added readme paragraph on bug reporting.

README.md

@@ -31,6 +31,21 @@ See the
 guide in the GLFW documentation.
 
 
+## Reporting bugs
+
+Bugs are reported to our [issue tracker](https://github.com/glfw/glfw/issues).
+Please always include the name and version of the OS where the bug occurs and
+the version of GLFW used.  If you have cloned it, include the commit ID used.
+
+If it's a build issue, please also include the build log and the name and
+version of your development environment.
+
+If it's a context creation issue, please also include the make and model of your
+graphics card and the version of your driver.
+
+This will help both us and other people experiencing the same bug.
+
+
 ## Dependencies
 
 GLFW bundles a number of dependencies in the `deps/` directory.