util: kill Python 2.4 deque.remove hack

summary: add a phase line (draft, secret) to the output The number of draft and secret changesets are currently not summarized. This is an important information because the number of drafts give some rough idea of the number of outgoing changesets in typical workflows, without needing to probe a remote repository. And a non-zero number of secrets means that those changeset will not be pushed. If the repository is "dirty" - some draft or secret changesets exists - then summary will display a line like: phases: X draft, Y secret (public) The phase in parenthesis corresponds to the highest phase of the parents of the working directory, i.e. the current phase. By default, the line is not printed if the repository is "clean" - all changesets are public - but if verbose is activated, it will display: phases: (public) On the other hand, nothing will be printed if quiet is in action. A few tests have been added in test-phases.t to cover the -v and -q cases.