Merged from trunk -r13369:13375

   Merged from trunk -r13369:13375

   | 13370   | Add notes about eclass precedence for metadata/layout.conf.  |
   | zmedico |                                                              |

   | 13371   | Emphasize precedence of repos.conf over layout.conf.         |
   | zmedico |                                                              |

   | 13372   | Tweak _eclasses_ logic inside action_metadata().             |
   | zmedico |                                                              |

   | 13373   | Add missing del when cleansing cache in action_metadata().   |
   | zmedico |                                                              |

   | 13374   | Drop from --ask to --pretend for uninstall all actions.      |
   | zmedico |                                                              |

   | 13375   | Add note about 'use' in the Atom.intersects() docstring.     |
   | zmedico |                                                              |

svn path=/main/branches/prefix/; revision=13392