Add ActionMap and ActionMap.add_action_entries() to overrides. Fixes #29

Adds ActionMap and ActionMap.add_action_entries() to allow for adding
multiple actions as a list of tuples in which each element defines
a single action like the GActionEntry C struct.

https://bugzilla.gnome.org/show_bug.cgi?id=678655

Original Author: Micah Carrick <micah@quixotix.com>
14 jobs for master in 17 minutes and 36 seconds (queued for 9 seconds)
Status Job ID Name Coverage
  Build And Test
passed #29021
pypy2

00:02:44

manual #29022
allowed to fail manual
pypy3
passed #29017
python2.7

00:02:30

passed #29013
win32
python2-mingw32

00:02:15

manual #29014
win32 allowed to fail manual
python2-mingw64
manual #29018
allowed to fail manual
python3.5
passed #29019
python3.6

00:11:28

passed #29020
python3.7

00:03:26

manual #29015
win32 allowed to fail manual
python3-mingw32
passed #29016
win32
python3-mingw64

00:02:04

passed #29023
xenial-i386-py2

00:01:59

 
  Coverage
passed #29024
coverage

00:03:24

 
  Deploy
passed #29025
pages

00:02:41

passed pages:deploy

00:00:01