phases: make outgoing object and discovery aware of exclusion The outgoing object gains an "excluded" members holding all changesets which were excluded because there where secret. The core discovery code now remove secret changeset from discovery by default. This means that any command relying on discovery will exclude secret changeset. Most notable one are outgoing and bundle. (But bundle with and explicit ``--base`` still allow to bundle outgoing changeset.

discovery: introduce outgoing object for result of findcommonoutgoing Simplifies client logic in multiple places since it encapsulates the computation of the common and, more importantly, the missing node lists. This also allows an upcomping patch to communicate precomputed versions of these lists to clients.

commands: make bundle use heads computed by findoutgoing

revlog: improve docstring for findcommonmissing

commands: bump copyright year

phase: mark messages for i18n

phase: fix up help string

phase: drop reference to working directory phase

phases: add a phases command to display and manipulate phases

annotate: append newline after non newline-terminated file listings The last line of a non newline-terminated file would mix with the first line of the next file in multiple-file listings before this patch. Possible compatibility issue: no longer possible to tell from the annotate output if the file is terminated by new line or not.