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Fix erroneous data_path in stream_file.py:load_stream_data Fix imports in init.py to work with sphinx documentation.

bob/io/stream/__init__.py

-from .stream_file import StreamFile
-from .stream import Stream
-
-# does that work?
-from .stream_filters import *
-
+from bob.io.stream.stream_file import StreamFile
+from bob.io.stream.stream import Stream, stream_filter, StreamFilter
+
+# import filters defined in stream.py
+from bob.io.stream.stream import AsType, \
+                                 StreamSelect, \
+                                 StreamView
+# import filters defined in stream_filters 
+from bob.io.stream.stream_filters import StreamColorMap, \
+                                         StreamNormalize, \
+                                         StreamClean, \
+                                         StreamStacked, \
+                                         StreamAdjust, \
+                                         StreamWarp, \
+                                         StreamStereo, \
+                                         StreamReproject, \
+                                         StreamSubtract
+
+# So that elements are available at package level, eg: bob.io.stream.Stream and not bob.io.stream.stream.Stream
+Stream.__module__ = "bob.io.stream"
+StreamFile.__module__ = "bob.io.stream"
+StreamFilter.__module__ = "bob.io.stream"
+stream_filter.__module__ = "bob.io.stream"
 
 def get_config():
     """Returns a string containing the configuration information.
-  """
+    """
 
     import bob.extension