Update contributing.md

Author: AlexandreRouma

contributing.md

@@ -1,6 +1,7 @@
 # Pull Requests
 
-TODO
+**I DO NOT ACCEPT PULL-REQUEST FOR FEATURES OR BUGFIXES REQUIRING SIGNIFICANT CODE/STRUCTURE CHANGES.**
+**SUCH PULL REQUESTS WILL BE CLOSED AUTOMATICALLY. OPEN AN ISSUE DETAILING FEATURE REQUESTS OR POTENTIAL BUGFIX INSTEAD.**
 
 # Code Style
 
@@ -122,4 +123,4 @@ Please follow this guide to properly format the JSON files for custom color maps
 
 * All additions and/or bug fixes to the core must not add additional dependencies.
 * Use VSCode for development, VS seems to cause issues.
-* DO NOT use libboost for any code meant for this repository
+* DO NOT use libboost for any code meant for this repository