default value handling added

__init__.py

 import bottombar as bb
+import os
 import readchar
 import string
 
         self.__bb_args__['__info__'] = (args, kwargs)
 
     def add_entry(self, name, f_key, function, *args, **kwargs):
+        try:
+            default = kwargs.pop('default')
+        except KeyError:
+            default = None
         if len(args) == 0:
             args = ("", )
         # store data for entry
         if function in [self.FUNC_BOOL]:
-            self.__bb_data__[name] = False
+            self.__bb_data__[name] = default or False
         elif function in [self.FUNC_TEXT]:
-            self.__bb_data__[name] = ""
+            self.__bb_data__[name] = default or ""
         elif function in [self.FUNC_INFO]:
             self.__bb_data__[name] = kwargs.pop('infotext')
         # store function and name for key
                         self.edit_active = name
                     elif DEBUG:
                         print("unused keystroke in run method:", repr(data))
+                else:
+                    if data in ['c', ]:
+                        os.system('clear')
+                    elif data in ['q', ]:
+                        break