Added version information to "report bug" message for unknown exceptions.

Fixes to "hg heads -r FOO": Make it actually work (undefined variable 'rev'; allow to pass a rev parameter). repo.branchlookup() doesn't need a copy of heads because it doesn't modify it. Use None as default argument to heads() instead of nullid. Doc string PEPification.

add a -r/--rev option to heads to show only heads descendant from rev

Always escape repository name in hgweb, very important in notfound.tmpl.

fix bug in setup.py introduced in r1508. The 'console' argument is expected to be a list of strings, but was changed to just a string.

close .hg/hgrc after writing the default values on clone this fix a bug where Dircleanup did not work because the file was still open

close file before renaming it (since it doesn't work the other way on windows)

fix errors found by pychecker

added st as alias for status in zsh_completition

Merge with Thomas Waldmann

made C src formatting more consistent

fixed some stuff pychecker shows, marked unclear/wrong stuff with XXX

minor optimization: save some string trash

use posix compliant option for head head -N is not posix compliant, head -n N should be used instead