add tab completion for node and interface inputs properties

Author: leej3

nipype/interfaces/base/core.py

@@ -178,6 +178,9 @@ def __init__(self, from_file=None, resource_monitor=None,
 
         self.inputs = self.input_spec(**inputs)
         self.ignore_exception = ignore_exception
+        in_spec = str(self.input_spec()).splitlines()
+        tab_list = [x.split(' ')[0] for x in in_spec if x not in ['']]
+        self.inputs.__all__ = tab_list
 
         if resource_monitor is not None:
             self.resource_monitor = resource_monitor