Add support to the status module for reading and supporting cover
letters, including comments. Plumb this through to the patchwork module.
The actual support in the latter is not yet integrated.

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

Now that we have the new asyncio implementation, drop the unused
ThreadPoolExecutor code.

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

The pager makes it easier to review large number of comments. Add it
around the output.

Patman normally sends multiple concurrent requests to the patchwork
server, as this is faster. Provide an option to disable this.

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

Now that all the pieces are in place, switch over from using an executor
to using asyncio.

While we are here, import defaultdict to avoid needing to specify its
module.

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

Import defaultdict to avoid needing to specify its module in multiple
places. Fix an extra blank line while here.

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

When comments are shown below patches it can be hard to see the patch
subject. Use yellow instead of blue, since it stands out better.

Pass the colour object into show_responses() rather than creating a new
one, since that is tidier.

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

Instead of passing the URL and function to each call, put the fake
into the Patchwork object instead.

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

This function does patchwork calls and then processes the results. Move
the processing out so we can (later) test it separately.

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

This function has three phases:

- collecting things from patchwork
- doing some processing
- showing the results to the user / creating a branch

Refactor into two functions so we can eventually have the patchwork part
fully separated out.

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

This function actually shows the status and does some other things.

Rename it to better reflect its purpose.

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