added package for clb-nb-utils (issue #5)

packages/clb-nb-utils/package.py

+from spack import *
+
+# Usage
+# from clb_nb_utils import oauth
+# oauth.get_token()
+class ClbNbUtils(PythonPackage):
+    url      = 'https://github.com/HumanBrainProject/clb-nb-utils/archive/refs/heads/master.zip'
+    maintainers = ['akarmas']
+    version('0.1.0','aa079ed0a8c4806db4657a6e7b534f4d')
+    depends_on('python@3.8:', type=('build','run'))
+    depends_on('py-setuptools', type=('build','run'))
+    depends_on('py-requests', type=('build','run'))