MAINT: add license info

Fixes scikit-learn#3577

Author: GaelVaroquaux

continuous_integration/install.sh

@@ -4,6 +4,8 @@
 # The behavior of the script is controlled by environment variabled defined
 # in the .travis.yml in the top level folder of the project.
 
+# License: 3-clause BSD
+
 set -e
 
 sudo apt-get update -qq

continuous_integration/test_script.sh

@@ -4,6 +4,8 @@
 # The behavior of the script is controlled by environment variabled defined
 # in the .travis.yml in the top level folder of the project.
 
+# License: 3-clause BSD
+
 set -e
 
 python --version

setup.py

@@ -2,6 +2,7 @@
 #
 # Copyright (C) 2007-2009 Cournapeau David <[email protected]>
 #               2010 Fabian Pedregosa <[email protected]>
+# License: 3-clause BSD
 
 descr = """A set of python modules for machine learning and data mining"""