Code review comment for lp:~sinzui/launchpad/needs-packaging-bug-509848

This is my branch to add the view for +needs-packaging. It also fixes two
bread crumb bugs: do not link the last item and white space is underlined.

    lp:~sinzui/launchpad/needs-packaging-bug-509848
    Diff size: 340
    Launchpad bug: https://bugs.launchpad.net/bugs/509848
                   https://bugs.launchpad.net/bugs/83613
                   https://bugs.launchpad.net/bugs/480473
    Test command: ./bin/test -vv \
        -t hierarchical-menu \
        -t packaging-views \
        -t xx-show-distroseries-packaging
    Pre-implementation: bac, beuno
    Target release: 10.01

Add the view for +needs-packaging
---------------------------------

Add a view and template to list the packages that need packaging links.
The view should follow the example in the ubuntu-link-to-upstream blueprint.

Rules
-----

    * Create a view that shows the prioritised listing of packages that need
      packaging links
    * Each item must show information that encourages users to link the
      package to an upstream project.
    * ADDENDUM: Fix the trailing bread crumb, it should not be linked because
      it is the current page. Fix the white space too.

QA
--

Visit staging (This relies on a model that depends upon a schema change)

    * https://staging.launchpad.net/ubuntu/lucid/+needs-packaging
    * Verify it lists the source packages that are not linked to upstream
    * Verify the link link to Upstream links works
    * Verify the page lists 100 packages.
    * Verify that the packages appear to be listed in order of bugs with
      the highest heat and most translatable messages. Since this information
      is not visible, it is difficult to judge. The crucial issue is, does
      the ordering look sane?

Lint
----

Linting changed files:
  lib/canonical/launchpad/doc/hierarchical-menu.txt
  lib/canonical/launchpad/icing/style-3-0.css
  lib/lp/app/templates/launchpad-hierarchy.pt
  lib/lp/registry/browser/configure.zcml
  lib/lp/registry/browser/distroseries.py
  lib/lp/registry/browser/tests/packaging-views.txt
  lib/lp/registry/stories/distroseries/xx-show-distroseries-packaging.txt
  lib/lp/registry/templates/distroseries-needs-packaging.pt

Test
----

    * lib/canonical/launchpad/doc/hierarchical-menu.txt
      * Updated test to verify that the last bread crumb is not linked.
    * lib/lp/registry/browser/tests/packaging-views.txt
      * Add a test for the new view to verify the page_title and label, as
        well as the BatchNavigator settings.
    * lib/lp/registry/stories/distroseries/xx-show-distroseries-packaging.txt
      * Add a simple story to demonstrate what any user can do with the
        page.
      * There is an XXX for a the portlet that will be added in my next
        branch.

Implementation
--------------

    * lib/canonical/launchpad/icing/style-3-0.css
      * Added a "narrow" class that uses the paragraph for content that
        is difficult to use when it fills the available space.
    * lib/lp/app/templates/launchpad-hierarchy.pt
      * Removed the access white space that cause the odd underlining in
        some browsers.
      * Added an omit-tag rule so that the last bread crumb is not linked.
    * lib/lp/registry/browser/configure.zcml
      * Registered the new view and template.
    * lib/lp/registry/browser/distroseries.py
      * Added a new view to show +needs-packaging.
    * lib/lp/registry/templates/distroseries-needs-packaging.pt
      * Added a new template to show +needs-packaging.