Use Copyright-Header.txt as template for the header.

Also, restrict the header to the Source and Tests directories,
otherwise all the pods were being added our header each time they
updated.

.gitattributes

@@ -1,2 +1,3 @@
 *.pbxproj binary merge=union
-*.[hm] filter=typhoonheader
+Source/*.[hm] filter=typhoonheader
+Tests/*.[hm] filter=typhoonheader

Scripts/typhoonheader

@@ -4,18 +4,7 @@
 # git config filter.typhoonheader.smudge 'cat'
 # git config filter.typhoonheader.clean '`git rev-parse --git-dir`/../scripts/typhoonheader'
 
-TYPHOON_HEADER = <<EOS
-////////////////////////////////////////////////////////////////////////////////
-//
-//  TYPHOON FRAMEWORK
-//  Copyright 2013, Jasper Blues & Contributors
-//  All Rights Reserved.
-//
-//  NOTICE: The authors permit you to use, modify, and distribute this file
-//  in accordance with the terms of the license agreement accompanying it.
-//
-////////////////////////////////////////////////////////////////////////////////
-EOS
+TYPHOON_HEADER = File.open(File.join(File.dirname($0), '..', 'Copyright-Header.txt')).read
 
 XCODE_HEADER = Regexp.new(<<EOS)
 \\A//