[PATCH 0 of 4] Print the bisection status in the log, v2

[Yann E. MORIN]

Hello All!

This patch series adds a new template keyword 'bisect and a new template
filter 'shortbisect'; and adds a new style 'bisect', to print the bisection
status of changesets. It also introduce two new bisect set descriptions
'goods' and 'bads' needed to properly report the changesets' status.

See the different patches for output examples.

Changes since v1:
 - rework the 'goods' and 'bads' revsets to be the topologically-good
   and -bad sets (Matt)
 - expose them to the user (Matt)
 - use uper-case letters for short labels (Gilles, Matt)
 - fix commit messages (Gilles) and update
 - add regression tests

Thank you all for the comments! :-)

  [PATCH 1/4] hbisect: add two new revset descriptions: 'goods' and 'bads'
  [PATCH 2/4] hbisect: add functions to return a label for a cset bisection status
  [PATCH 3/4] templates: add 'bisect' keyword to return a cset's bisect status
  [PATCH 4/4] styles: add new 'bisect' style that prints the bisection status

Regards,
Yann E. MORIN.