mq: deprecate qinit and qcommit

mq: deprecate qsave, qrestore and related options

mq: add --mq option to some commands This causes them to operate on the queue repository as qcommit does, and is nicer than hg -R $(hg root)

pull: with -u and -r, update to the first revision given This makes pull consistent with clone. The actual change is in mercurial.hg.parseurl, changing its checkout result, which is only used for pull.

localrepo: inline single-use nested function

localrepo: unify changegroup and changegroupsubset code paths a bit

merge: add hints about the use of 'hg heads' to find the rev to merge

prepush: warn about every new outgoing named branch, not just the first

prepush: rename variables, refactor

rebase: add --detach option to detach intermediate revisions (issue1950) When rebasing an intermediate revision, rebase keeps a parent relationship with the original parent. This option forces the removal of this relationship. In more depth, it 'fakes' null merges between the target revision and the ancestors of source, dropping every change from the ancestors. The result is that every change in source and its descendants will be rebased, ignoring the changes in its ancestors.