stop read end of pipe from staying open forever in child process.

add --daemon option to serve command. for issue 45. code looks odd because it is portable to windows. windows does not have os.fork, so have to spawn and use pipe to tell parent ready instead.

AmbiguousCommand is raised too soon. Right now, hg raises AmbiguousCommand as soon as it finds two commands/aliases that start with the substring it's searching for, even though it may still find a full match later on. This is a bit hard to hit on purpose, because hg checks the list of commands in whatever order is returned by table.keys(), which will change when you add an alias to a command. You should be able to hit it by adding an alias "u" to the "identify" command - not that that makes a lot of sense...

Don't hard-code /tmp in test-ro-message This makes the test succeed when $TMPDIR is set.

Merge with crew

add preoutgoing and outgoing hooks. preoutgoing lets prevent pull over http or ssh. outgoing lets notify after pull.

i forgot to change the test output for test-hook.

tests for new hooks. fix things i found when writing tests.

fix test-help diff options.

merge with crew.