added propsbase file which was needed in windows

props/propsbase.py

+from __future__ import absolute_import, division, print_function
+from builtins import *  # @UnusedWildImport
+
+from mcculw import ul
+
+
+class Props(object):
+    """The base class for classes that provide hardware information for the
+    library examples. Subclasses of this class may change hardware values.
+    It is recommended that the values provided by these classes be
+    hard-coded in production code.
+    """
+
+    def __init__(self, params): pass
+
+    def get_config_array(self, info_type, board_num, count_item, value_item,
+                         wrapper_type=None):
+        result = []
+
+        count = ul.get_config(info_type, board_num, 0, count_item)
+        for item_num in range(count):
+            config_value = ul.get_config(
+                info_type, board_num, item_num, value_item)
+            if wrapper_type == None:
+                result.append(config_value)
+            else:
+                result.append(wrapper_type(config_value))
+
+        return result