Add extra commented section to use when using Gradle or Maven auto-import.
These are mentioned in the original reference for optional excludes (https://intellij-support.jetbrains.com/hc/en-us/articles/
206544839).
If this would be better as a separate, non-commented ignore file, let me know and I will resubmit.
.idea/**/gradle.xml
.idea/**/libraries
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn. Uncomment if using
+# auto-import.
+# .idea/modules.xml
+# .idea/**/*.iml
+# .idea/libraries/**/*.xml
+
# CMake
cmake-build-*/