fix [#26601] Python error when use of autocomplete

Was a naming collision with 'keys' python method, reserve keys/items/values/get for python.
Updated animsys_update.py for shapekey data paths.

renamed:
  Particle.hair --> hair_keys
  Particle.keys --> particle_keys
  Key.keys --> key_blocks
  EnumProperty.items --> enum_items
  KeyMap.items --> keymap_items 

noted:
  http://wiki.blender.org/index.php/Dev:2.5/Py/API/Updates#Since_2.56a

1 files changed, 15 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_define.c b/source/blender/makesrna/intern/rna_define.c
index 4a14b2286f9..12f15911bda 100644
--- a/source/blender/makesrna/intern/rna_define.c
+++ b/source/blender/makesrna/intern/rna_define.c
@@ -411,6 +411,21 @@ static int rna_validate_identifier(const char *identifier, char *error, int prop
 			return 0;
 		}
 	}
+
+	if(property) {
+		static const char *kwlist_prop[] = {
+			/* not keywords but reserved all the same because py uses */
+			"keys", "values", "items", "get",
+			NULL
+		};
+
+		for(a=0; kwlist_prop[a]; a++) {
+			if (strcmp(identifier, kwlist_prop[a]) == 0) {
+				strcpy(error, "this keyword is reserved by python");
+				return 0;
+			}
+		}
+	}
 	
 	return 1;
 }