List removed (non-whitelisted) resources when repacking.

grit/format/data_pack.py

Index: grit/format/data_pack.py
===================================================================
--- grit/format/data_pack.py	(revision 160)
+++ grit/format/data_pack.py	(working copy)
@@ -137,7 +137,7 @@
 
   Args:
       inputs: a list of data pack strings that need to be combined.
-      whitelist: a list of resource IDs that should be kep in the output string
+      whitelist: a list of resource IDs that should be kept in the output string
                  or None to include all resources.
 
   Returns:
@@ -168,6 +168,10 @@
                                     for key in content.resources.keys()
                                     if key in whitelist])
       resources.update(whitelisted_resources)
+      removed_keys = [key for key in content.resources.keys()
+                      if key not in whitelist]
+      for key in removed_keys:
+        print 'RePackFromDataPackStrings Removed Key:', key
     else:
       resources.update(content.resources)