Add CODEOWNERS file

Resolves #200

CODEOWNERS

@@ -0,0 +1,32 @@
+# Lines starting with '#' are comments.
+# Each line is a file pattern followed by one or more owners.
+
+# These owners will be the default owners for everything in the repo
+*              @emilgoldsmith @zanemountcastle
+
+# Beware that order is important, the last matching pattern has the most precedence.
+
+# Zane has default ownership of all css and scss files
+*.css          @zanemountcastle
+*.scss         @zanemountcastle
+
+# Zane has ownership of the styles folder
+src/styles/*   @zanemountcastle
+
+# Zane has ownership of the components file (but not the editor subfolder
+# which will be overwritten in the following definition)
+src/components/* @zanemountcastle
+
+# Emil has ownership over the editor components
+src/components/editor/*   @emilgoldsmith
+
+# Emil has ownership over the lib folder
+src/lib/*          @emilgoldsmith
+
+# Zane has ownership over the transitions folder
+src/transitions/*  @zanemountcastle
+
+# Emil has ownership over client-scripts, server-code folders and index.js
+src/client-scripts/*  @emilgoldsmith
+src/server-code/*     @emilgoldsmith
+src/index.js          @emilgoldsmith