Merged from trunk 7913:7918

   Merged from trunk 7913:7918

   | 7914    | Make repoman bail out if it is unable to properly access     |
   | zmedico | ebuild metadata for some reason. In this case it's           |
   |         | impossible to generate a Manifest and therefore the --force  |
   |         | option has to be disabled.                                   |

   | 7915    | Fix logic for the message that's show when --force is        |
   | zmedico | disabled.                                                    |

   | 7916    | Make portdbapi.getfetchlist() bail out if the EAPI is        |
   | zmedico | unsupported. This makes it impossible for an unsupported     |
   |         | EAPI to result in invalid Manifest generation.               |

   | 7917    | Include the package name in all exceptions raised from       |
   | zmedico | portdbapi.getfetchlist() so that a redundant and sometimes   |
   |         | inaccurate message doesn't have to be shown when the error   |
   |         | is caught in digestgen().                                    |

   | 7918    | Handle UnsupportedAPIException when running the ebuild(1)    |
   | zmedico | command.                                                     |

svn path=/main/branches/prefix/; revision=7955