Added plugin list

pymolfile/__init__.py

 
 from __future__ import absolute_import
 
-from . import trajectory
+from . import pymolfile
 
 __all__ = [ "pymolfile" ]
+
+MOLFILE_PLUGINS = pymolfile.plugins()
+

pymolfile/pymolfile.py

@@ -60,14 +60,14 @@ def open(file_name_with_path, topology=None,
     """ The main function to read topology and 
         trajectory files
 
-        Returns: Depends on the file format and info.
+        Returns: Depends on the file format and arguments:
                  If structure file is supplied, it returns topology class.
                  If only trajectory file is supplied, it returns trajectory class 
                      without topology information. (the number of atoms must be known)
                  If both files are supplied, it returns trajectory class with 
                      topology information.
     """
-    if 
+    if MOLFILE_PLUGINS