fixed some licensing issues

VERSION

@@ -1 +1 @@
-Version 2.9.5-trunk+timestamp.2014.03.31.00.23.41
+Version 2.9.5-trunk+timestamp.2014.04.02.09.18.42

gluon/contrib/AuthorizeNet.py

@@ -3,7 +3,7 @@ AIM class to credit card payment with authorize.net
 
 Fork of authnet code written by John Conde
 http://www.johnconde.net/blog/integrate-the-authorizenet-aim-api-with-python-3-2/
-Unknown license, assuming public domain
+BSDv3 License
 
 Modifed by Massimo Di Pierro
 

gluon/contrib/DowCommerce.py

@@ -3,7 +3,7 @@ DowCommerce class to process credit card payments with DowCommerce.com
 
 Modifications to support Dow Commerce API from code originally written by John Conde
 http://www.johnconde.net/blog/integrate-the-authorizenet-aim-api-with-python-3-2/
-Unknown license, assuming public domain
+BSDv3 License
 
 Modifed by Dave Stoll dave.stoll@gmail.com
 

gluon/contrib/memdb.py

@@ -5,7 +5,7 @@
 This file is part of web2py Web Framework (Copyrighted, 2007-2009).
 Developed by Massimo Di Pierro <mdipierro@cs.depaul.edu> and
 Robin B <robi123@gmail.com>.
-License: GPL v2
+License: LGPLv3
 """
 
 __all__ = ['MEMDB', 'Field']

gluon/contrib/spreadsheet.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
 """
-Developed by Massimo Di Pierro, optional component of web2py, GPL2 license.
+Developed by Massimo Di Pierro, optional component of web2py, BSDv3 license.
 """
 
 import re