add initial Config class, calculate config fname

Config.py

@@ -0,0 +1,6 @@
+
+class Config:
+    def __init__(self, filename):
+        if os.path.isfile(filename):
+            f = open(filename, 'r')
+            eval(f, self)

dwtt

@@ -37,6 +37,7 @@ def main(argv):
         usage()
         return 2
 
+    conf_file = dbfile + '.conf'
     ds = DataStore(dbfile)
     w = Window(ds)
     w.main()