Merged from trunk -r14635:14667

   Merged from trunk -r14635:14667

   | 14660    | Ind SetConfig.getSetAtoms(), don't assume the set has a     |
   | zmedico  | 'creator' attribute, since if sets.conf is corrupt then     |
   |          | emerge generates fallback sets without the 'creator'        |
   |          | attribute.                                                  |

   | 14662    | Preserve variables which have been set in global scope      |
   | arfrever | using 'declare'.                                            |

   | 14663    | Remove reference to non-existent _source_ebuild function.   |
   | zmedico  |                                                             |

   | 14664    | Fix breakage in DEFINED_PHASES code.                        |
   | zmedico  |                                                             |

   | 14665    | Add a --use-ebuild-visibility option, for using unbuilt     |
   | zmedico  | ebuild metadata in visibility checks for built ebuilds.     |
   |          | Thanks to Sebastian Mingramm (few) for reporting the        |
   |          | problem and testing the patch.                              |

   | 14666    | Warn aabout default world and system set configuration      |
   | zmedico  | being used when sets.conf is corrupt. Thanks to Thanks to   |
   |          | Sebastian Mingramm (few) for the suggestion.                |

   | 14667    | Convert --select to boolean True when enabled, so --resume  |
   | zmedico  | code handles it like other boolean options.                 |

svn path=/main/branches/prefix/; revision=14671