Adding finalized copyright statement

LICENSE.txt

@@ -1,5 +1,6 @@
 ##########################################################################
-# Copyright 2013 Project Hydra
+# Copyright 2013 Notre Dame, Data Curation Experts, WGBH
+# Additional copyright may be held by others, as reflected in the commit log
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -11,4 +12,4 @@
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
-# limitations under the License.
+# limitations under the License.