use the new parseindex implementation C in parsers

C implementation of revlog index parsing

Allow hgweb to search for templates in more than one path. This patch is constructed to make it easy for external extensions to provide their own templates, by updating templater.path.

python2.6: use subprocess if available

tests: add some testing for patch.diffstat()

bdiff: normalize the diff (issue1295) When the common part of a diff can be moved forward, move it forward. Otherwise we don't get deterministic results (it would depends on the way we split for the recursion). That way we get identical hunks when doing the same change, it helps to solve issue1295 (inconsistent diffs on different side during a merge).

merge with crew

hgweb: cleanup the manifest generation

convert: make built-in cvsps the default Reviewed by Frank Kingswood <frank@kingswood-consulting.co.uk>

merge with crew