Added codeowners file.

Author: kgodey

.github/CODEOWNERS

@@ -0,0 +1,8 @@
+# These owners will be the default owners for everything in
+# the repo. Unless a later match takes precedence, they will 
+# be requested for review when someone opens a pull request.
+* @creativecommons/internal-tech
+
+# These users owns any files in the specified directory and 
+# any of its subdirectories.
+/webpack/ @creativecommons/frontend-engineers