fixed a bug when parsing an attr list that a/some value[s] is Int w/ anyconfig.parse.parse_attrlist_0, and added some doctest cases for this problem
changed behavior of anyconfig.parser.parse_attrlist_0 to return [(key, val), ..] instead of [(key, [val]), ...] when val part in attrlist is single item
added some more test cases to check some previous changes in anyconfig.parser
added some more test cases for multiple inputs and '-A' option