[PATCH 22/25] patman: Implement the series subcommand

[Simon Glass]

Add a command to support management of series. These are local branches
which may have been sent to the mailing list, so may appear on the
patchwork server.

The new functionality uses a database, stored in a local file.

Various operations are supported:
   - add a new series
   - send a series and automatically link it with patchwork
   - 'increment' the version, to prepare to send an updated series
   - gather review/test tags from patchwork
   - check on progress, i.e. patches which are received new tags or
     comments
   - show comments on patches and cover letters

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 tools/patman/cmdline.py | 183 ++++++++++++++++++++++++++++++++++++++++
 tools/patman/control.py | 107 +++++++++++++++++++++++
 2 files changed, 290 insertions(+)

Applied to sjg/master, thanks!