/brz/remove-bazaar

Replace 'reverse' by 'backward' when talking about revision order.

* tests/test_missing.py:
(TestMissing.assertUnmerged): Use default value for order.
(TestFindUnmerged.test_include_merges): Respect default order to
keep all related tests coherent.

* builtins.py:
(cmd_missing.run): Reverse means forward.

* missing.py:
(find_unmerged, _enumerate_mainline, _enumerate_with_merges):
Revert the 'reverse' parameter addition, renaming it
'backward'. 'reverse' is too confusing, just re-read the previous
sentence if you disagree (and I put quotes to help the reader...).

* log.py:
(get_view_revisions): Revert noisy cleanup.