merge with crew

convert: use set instead of dict

bugzilla: use set instead of dict

rebase: use set instead of dict

revlog.missing(): use sets instead of a dict

tests: add missing interpreter lines

cvsnt-mergepoints test: use sh instead of bash

tests: removed unnecessary execute bit on Python tests

tests: renamed Python tests to .py

tests: renamed helper to avoid clash with stdlib repr module

tests: fix doc string in get-with-headers.py

tests: use repr.py to avoid binary characters in test output

tests: new helper for tests with binary output

convert: improve docstrings, comments.

changelog: turn {de,en}code_extra methods into functions The methods were not really methods -- they didn't use 'self'. Having them as functions in the module it useful for other modules (like the commitsigs extension) that want to recompute the changeset hash and thus want to encode dicts the same way as changelog does it. Removed the underbars from their names at the same time.

merge with crew-stable

contrib/win32: add simple style sheet

contrib/win32: updated title of the hgbook

contrib/win32: format file names and env vars with <tt>

contrib/win32: indent and word wrap consistently

contrib/win32: add missing <p> tags

contrib/win32: fix HTML tag nesting

contrib/win32: license is GPLv2 only according to Matt Mackall

Merge with crew-stable