Merged from trunk -r12771:12779

   Merged from trunk -r12771:12779

   | 12772   | Fix LazyItemsDict.update() to create new _SingletonWrapper   |
   | zmedico | instances that reference self.                               |

   | 12773   | Simplify LazyItemsDict internals.                            |
   | zmedico |                                                              |

   | 12774   | Allow unicode type values in config.__setitem__(). Thanks to |
   | zmedico | Arfrever Frehtes Taifersar Arahesis for this patch.          |

   | 12775   | Always use basestring instead of str with isinstance().      |
   | zmedico |                                                              |

   | 12776   | Fix __getitem__ to convert mtime to long, and remove         |
   | zmedico | unreachable code from _parse_data().                         |

   | 12777   | Fix an issue with incomplete deepcopy of _LazyItem instances |
   | zmedico | inside LazyItemsDict.__deepcopy__(). Thanks to Arfrever for  |
   |         | reporting.                                                   |

   | 12778   | Remove unnecessary list() from previous commit.              |
   | zmedico |                                                              |

   | 12779   | Use slice instead of startwith in stack_* incremental        |
   | zmedico | processing.                                                  |

svn path=/main/branches/prefix/; revision=12787