Update __init__.py: suppress warnings on import

cwinpy/__init__.py

 import io
+import warnings
 
-# register reader/writer
-from . import iostream
-from .data import HeterodynedData, MultiHeterodynedData
-from .info import *
-from .knope import skyshift
-from .parfile import PulsarParameters
+# suppress warnings
+with warnings.catch_warnings():
+    warnings.filterwarnings("ignore", message="Wswiglal-redir-stdio")
+    warnings.filterwarnings("ignore", message="(.*)CONDOR_CONFIG(.*)")
+
+    # register reader/writer
+    from . import iostream
+    from .data import HeterodynedData, MultiHeterodynedData
+    from .info import *
+    from .knope import skyshift
+    from .parfile import PulsarParameters
 
 try:
     from ._version import version as __version__