move the reading of branch.cache from _branchtags to branchtags

localrepo: keep the UTF-8 version of branchcache around

localrepo.invalidate: invalidate branchcache

keyword: do not inspect node1 for diff if node2 is given

keyword: add test for patch.diff monkey

keyword: make main class and hg command accessible Switch from global vars to top level dictionary. Goal: make it easier for external tools (like tortoisehg) to hook into keyword extension.

keyword: move expand/shrink decisions into kwtemplater - do not clobber wrapper code - get rid of clumsy kwtemplater attributes

try to fix test-inherit-mode on HFS+ HFS+ doesn't like setgid directories, so avoid them in most of the test and do a quick check that doesn't change the output when everything's OK.

cmdutil.commit: use relative paths in the error messages This is more consistent with other error messages and requires less makeup in test-commit and test-symlink-basic.

util.pathto: return '.' instead of an empty string This could happen with something like pathto(repo.root, 'foo/bar', 'foo/bar')