Merge ~xnox/bileto:add-artful into bileto:master

[Dimitri John Ledkov]

Add a combo option to do 'artful, zesty, yakkety, xenial'.

Artful by itself will be available once it is marked as active in launchpad.

[Steve Langasek (vorlon)]

we should instead remove all support for multi-series landings.

review: Disapprove

Unmerged commits

d82c881... by Dimitri John Ledkov on 2017-04-21

Add a combo for all four supported series, with artful.

diff --git a/bileto/v2.py b/bileto/v2.py
index b6a3c3c..1ce365d 100644
--- a/bileto/v2.py
+++ b/bileto/v2.py
@@ -35,6 +35,7 @@ EXPAND = {'search'}
 CONTRACT = EXPAND | {'comments', 'merge_proposals'}
 SLASH = '/'
 SERIES = [
+    'artful, zesty, yakkety, xenial',
     'zesty-overlay, xenial-overlay',
     'zesty, xenial-overlay',
     'zesty, yakkety',