Update version strings and add release notes to Windows specific files

Fall back to asciidoc6 html backend if html4 doesn't work. This reenables building documentation on Debian sarge, which broke after 9346a7fb3fe2.

Reverted name change (mercurial -> Mercurial) from dd5085897010.

merge with crew.

make stuff for macos x binary package. it is now easy to make prebuilt binary for macos x. i have no hosting space. i hope someone else can make binaries.

extension gpg.py: really raise the exception in case of invalid data

Cleanup of spacing in bash_completion