clarify that CC-BY license only covers docs in source code

LICENSE

@@ -29,8 +29,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ----------
 
 Some documentation is taken from the GitHub Developer site
-<http://developer.github.com/>, which is available under a Creative Commons
-Attribution 3.0 License:
+<http://developer.github.com/>, which is available under the following Creative
+Commons Attribution 3.0 License.  This applies only to the go-github source
+code and would not apply to any compiled binaries.
 
 THE WORK (AS DEFINED BELOW) IS PROVIDED UNDER THE TERMS OF THIS CREATIVE
 COMMONS PUBLIC LICENSE ("CCPL" OR "LICENSE"). THE WORK IS PROTECTED BY