Add required defaults.

awaycolours/plugin.config

@@ -7,6 +7,7 @@ keysections:
   metadata
   updates
   version
+  defaults
 
 metadata:
   author=Greboid <greg@dmdirc.com>
@@ -19,4 +20,9 @@ updates:
   id=75
 
 version:
-  friendly=0.1
+  friendly=0.1
+
+defaults:
+  colour=15
+  text=true
+  nicklist=true