Add GPLv3+ License-Identifier to remaining files

galvani/BioLogic.py

@@ -2,6 +2,8 @@
 """Code to read in data files from Bio-Logic instruments"""
 
 # SPDX-FileCopyrightText: 2013-2020 Christopher Kerr, "bcolsen"
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 __all__ = ['MPTfileCSV', 'MPTfile']
 

galvani/__init__.py

@@ -1,4 +1,6 @@
 # SPDX-FileCopyrightText: 2014-2019 Christopher Kerr <chris.kerr@mykolab.ch>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 from .BioLogic import MPRfile, MPTfile
 

galvani/res2sqlite.py

@@ -1,6 +1,8 @@
 #!/usr/bin/python
 
 # SPDX-FileCopyrightText: 2013-2020 Christopher Kerr <chris.kerr@mykolab.ch>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 import subprocess as sp
 import sqlite3