pkg __init__: revised, added __all__

src/icartt/__init__.py

-from .dataset import Dataset, StandardNormalComments, Variable, Formats, VariableType
-
-
+# VERSION
 def get_version():
     try:
         # Python >= 3.8
@@ -13,8 +11,12 @@ def get_version():
 
         return pkg_resources.get_distribution("icartt").version
 
-
 __version__ = get_version()
+del get_version
 
 
-# TODO: add __all__ = ("names of exported classes etc.",) ?
+
+# EXPORTED TYPES
+from .dataset import Dataset, StandardNormalComments, Variable, Formats, VariableType
+
+__all__ = ("Dataset", "StandardNormalComments", "Variable", "Formats", "VariableType")
\ No newline at end of file