Minor default branch cleanups

Move branches.cache to branch.cache Keeps old clients from conflicting with new caches, makes features logic unnecessary.

"default" is the default branch name

Test update to branch tip

Make update with no node jump to the tip of the current branch

fix qrefresh'ing an empty patch This is not superefficient (the commit will have to walk the whole tree), but it works.

statwalk: don't put self.root in the files list That list is supposed to contain internal, normalized names ("/"-separated, relative to the repo root), not OS-native paths.

fix qclone to a remote repo This fixes issue467. -stable still needs something like revision 55578a8d7e84 - mq: allow push if -r is given explicitly. In the meantime, hg qpop -a; hg qclone . ssh://... is a workaround.

Save an absolute path in repo.path This should keep things working if the process changes directories after creating a repo object.

Add tests for .hg/branches.cache feature list.

Add a features list to branches.cache to detect caches of old hg versions. The leading space in the written file makes sure that the feature list never can match an existing version, even if the first feature can be read as hex. Additionally old hg versions display the id with --debug, too.

Store empty (default) branch in branch cache, too. Operations on this branch don't work otherwise. Reading branches.cache had to be adjusted to allow an empty label. Adjusted reading of the cache tip for symmetry, no functional change here.

small fixes for the parent patch - format.usestore is a boolean option - python wart: ("revlogv1") is a string, not a tuple - only create a dummy changelog if we're using a store - add a test

Merge with crew

hgweb: use the given revision in the name of the archive If you ask for an archive in hgweb by tagname the directory in the archive should include the tagname not the changeset-id.

Allow disabling store format to work with absurdly long filenames

incoming/outgoing: print the name of the other repo

localrepo.status: use manifest.find on "lookup" files

localrepo.status: fcmp gets a getnode function instead of the manifest

fix manifest.find

merge with crew-stable

Fix sed expression in test-notify to be more portable.

Fix help text for hg status -i

purge.py: fix invocation of statwalk

Delete the README for purge, putting the useful informations in comments

Delete the Purge class, refactoring Purge.purge() in dopurge()

Do not use 'self' in the purge() method Avoid any reference to 'self' in Purge.purge() to allow its refactoring in a simple function.

Use nested functions instead of object methods

Merge _remove_file() and _remove_dir() in a single function

Use "f in dirstate" instead of "dirstate.state(f) == '?'"

Reduce the absolute/relative path conversion in the purge extension

Make the purge extension use the statwalk walker from the dirstate object