chore(logging): set up logger for package correctly

So that only loggers for this package use the format string etc.

Otherwise, if we set basicConfig, the module that is imported first gets
its formatter set as the default (pyNeuroML) for example.

neuroml/__init__.py

@@ -6,13 +6,20 @@
 from .__version__ import current_neuroml_version as current_neuroml_version
 from .nml.nml import *  # allows importation of all neuroml classes
 
-logging.basicConfig(
-    format="libNeuroML >>> %(levelname)s - %(message)s",
-    level=logging.WARN,
-)
-
+# Define a logger for the package
 logger = logging.getLogger(__name__)
 logger.setLevel(logging.INFO)
+logger.propagate = False
+
+ch = logging.StreamHandler()
+# do not set level for handler
+
+formatter = logging.Formatter(
+    "libNeuroML >>> %(asctime)s - %(levelname)s - %(message)s", datefmt="%H:%M:%S"
+)
+ch.setFormatter(formatter)
+
+logger.addHandler(ch)
 
 
 def print_(text, verbose=True):