Added replacement tags in headers + Misc updates

licenses/apache_v2.header

@@ -1,4 +1,4 @@
-Copyright [yyyy] [name of copyright owner]
+Copyright ###DATE### ###NAME###
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

licenses/gpl_v3.header

@@ -1,5 +1,5 @@
-<one line to give the program's name and a brief idea of what it does.>
-Copyright (C) <year>  <name of author>
+###DESCRIPTION###
+Copyright (C) ###DATE### ###NAME###
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by

licenses/mit.header

@@ -1,4 +1,4 @@
-Copyright (c) <year> <copyright holders>
+Copyright (c) ###DATE### ###NAME###
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in